CN104917424B - A kind of motor internal contracting brake control system of building hoist - Google Patents
A kind of motor internal contracting brake control system of building hoist Download PDFInfo
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- CN104917424B CN104917424B CN201510275452.5A CN201510275452A CN104917424B CN 104917424 B CN104917424 B CN 104917424B CN 201510275452 A CN201510275452 A CN 201510275452A CN 104917424 B CN104917424 B CN 104917424B
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Abstract
The application provides a kind of motor internal contracting brake control system of building hoist, when the voltage fluctuation of power grid input terminal output, voltage sampling signal can fluctuate therewith, but control unit can obtain the angle of flow according to default band-type brake output voltage and the voltage sampling signal, it is generated further according to the angle of flow and exports pwm control signal, controlled rectification driving circuit is controlled according to the pwm control signal, it generates and exports rectification drive signal, again by controlled rectification circuit by by the voltage that power grid input terminal inputs according to being exported after the rectification drive signal rectification to the default band-type brake output voltage, finally so that the voltage of motor internal contracting brake braking power output will not follow the voltage inputted by power grid input terminal to be fluctuated, and then it ensure that the safe internal contracting of the band-type brake motor of the building hoist and declutch.Meanwhile the application provide the building hoist motor internal contracting brake control system without Industrial Frequency Transformer, so reducing cost compared with prior art.
Description
Technical field
The present invention relates to a kind of controls of the motor internal contracting brake of building hoist technical field more particularly to building hoist to be
System.
Background technology
In the operational process of building hoist, when there is frequency converter report failure, manual stoppage or the main electricity of input AC
During the situation of power down, the building hoist needs to shut down in time, i.e., the band-type brake motor needs of described building hoist immediately by
Locking.And the band-type brake motor usually carries out band-type brake, the direct solenoid braking with DC electromagnetic brake (i.e. band-type brake coil)
The operation principle of device is：When the DC electromagnetic brake obtain the certain voltage provided by motor internal contracting brake braking power (such as
Nominal DC 195V) when, you can it declutches, the band-type brake motor normal operation；When the DC electromagnetic brake dead electricity, you can
Realize band-type brake, the band-type brake motor is out of service.
The motor internal contracting brake braking power of the prior art for DC electromagnetic brake power supply uses mostly
The specified network voltages of 380V are depressurized to 220VAC by Industrial Frequency Transformer, using offer steamed bun wave voltage after full-wave rectification
198VDC gives the DC electromagnetic brake；If without the decompression of the Industrial Frequency Transformer, directly by the specified power grids of 380V
Voltage, which carries out full-wave rectification, will draw 342VDC, and 171VDC is exported if by halfwave rectifier, does not comply with the direct current
The rated voltage demand of magnetic brake.So there must be an Industrial Frequency Transformer in the prior art so that the cost of scheme compared with
It is high.
Simultaneously the band-type brake output voltage of motor internal contracting brake braking power described in this scheme can with the fluctuation of network voltage ripple
Dynamic, if network voltage is too high, the DC electromagnetic brake will generate heat seriously, the fragile direct solenoid braking
Device influences the service life of the DC electromagnetic brake；If network voltage is too low, it is likely that the direct solenoid is caused to be braked
Device cannot declutch completely, so as to influence the normal operation of motor.
The content of the invention
In view of this, the present invention provides a kind of motor internal contracting brake control system of building hoist, to solve the prior art
In cost it is higher and the problem of band-type brake output voltage is with voltage ripple of power network.
To achieve these goals, technical solution provided in an embodiment of the present invention is as follows：
A kind of motor internal contracting brake control system of building hoist, including：Control unit is connected to power grid input terminal and band-type brake
The motor internal contracting brake braking power being connected between the band-type brake coil of motor and with described control unit；Wherein：
The motor internal contracting brake braking power includes：The voltage sampling circuit being connected with described control unit, for sample by
The voltage and the output voltage and phase of phase or the motor internal contracting brake braking power of the power grid input terminal input, generation is simultaneously
Export the voltage sampling signal；
Described control unit is used to receive the voltage sampling signal, and according to default band-type brake output voltage and the voltage
Sampled signal obtains the angle of flow, is generated according to the angle of flow and exports pwm control signal；
The motor internal contracting brake braking power further includes：
The controlled rectification driving circuit being connected with described control unit, it is raw for reception and according to the pwm control signal
Into and export rectification drive signal；
The controlled rectification circuit being connected between the band-type brake coil of the power grid input terminal and the band-type brake motor, it is described can
The control terminal of control rectifying circuit is connected with the output terminal of the controlled rectification driving circuit；The controlled rectification circuit is used to receive
The rectification drive signal, and according to the rectification drive signal by by the voltage commutation that the power grid input terminal inputs to described
It is exported after default band-type brake output voltage.
Preferably, the angle of flow is silicon-controlled ON time and conduction phase.
Preferably, the power grid input terminal is used to connect power grid AC380V.
Preferably, the controlled rectification circuit be half-controlled rectifier circuit, the controlled rectification driving circuit using optocoupler every
From, transformer isolation or the topological structure of relay isolation.
Preferably, the voltage sampling circuit is connected between the power grid input terminal and described control unit, for adopting
The voltage and phase that sample is inputted by the power grid input terminal, generate and export the voltage sampling signal；Described control unit root
Formula is used by obtaining the angle of flow according to the voltage sampling signal：
Wherein, VavFor the default band-type brake output voltage, VpeakPeak value for the voltage inputted by the power grid input terminal,
π-x are the angle of flow, and θ is the input phase of the power grid input terminal.
Preferably, the voltage sampling circuit be connected to the output terminal of the controlled rectification circuit and described control unit it
Between, for sampling the output voltage and phase of the motor internal contracting brake braking power, generate and export the voltage sampling signal；Institute
Stating voltage sampling signal includes the voltage value and phase of output voltage of the motor internal contracting brake braking power；
When described control unit execution obtains the step of the angle of flow according to the voltage sampling signal, it is specifically used for：According to
Difference between the actual value of the output voltage included in the voltage sampling signal and the default band-type brake output voltage,
The angle of flow is adjusted, until the difference is zero, obtains the angle of flow.
Preferably, the motor internal contracting brake control system further includes keyboard, and the keyboard is：LED keyboards, liquid crystal keyboard or
Person's LCD keyboards, for tuning parameter and display frequency conversion output frequency voltage and current band-type brake voltage value.
Preferably, the band-type brake coil freewheeling circuit being connected with the band-type brake coil of the band-type brake motor includes：
The first resistor being connected in series and the first diode；The series via of the first resistor and first diode
Both ends of the both ends respectively with the band-type brake coil of the band-type brake motor be connected.
Preferably, the motor internal contracting brake braking power further includes：
The first normal open switch being connected between the band-type brake coil of the controlled rectification circuit and the band-type brake motor；
The first switch control circuit being connected between the control terminal and described control unit of first normal open switch.
Preferably, the motor internal contracting brake braking power further includes：
The second normal open switch being connected between the power grid input terminal and the controlled rectification circuit；
The second switch control circuit being connected between the control terminal and described control unit of second normal open switch.
The application provides a kind of motor internal contracting brake control system of building hoist, when the voltage fluctuation of power grid input terminal output
When, voltage sampling signal can fluctuate therewith, but control unit can be according to default band-type brake output voltage and voltage sample letter
Number the angle of flow is obtained, generated further according to the angle of flow and export pwm control signal, control controlled rectification driving circuit is according to institute
Pwm control signal is stated, generate and exports rectification drive signal, then will be inputted by controlled rectification circuit by the power grid input terminal
Voltage after the rectification drive signal rectification to the default band-type brake output voltage according to exporting, finally so that the motor internal contracting brake
The voltage of braking power output will not follow the voltage by power grid input terminal input to be fluctuated, and then ensure that described
It the safe internal contracting of the band-type brake motor of building hoist and declutches.Meanwhile the motor of the building hoist of the application offer is embraced
Lock control system is without Industrial Frequency Transformer, so reducing cost compared with prior art.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of motor internal contracting brake control system architecture schematic diagram of building hoist provided by the embodiments of the present application；
Fig. 2 is a kind of part-structure of the motor internal contracting brake control system for building hoist that another embodiment of the application provides
Schematic diagram；
Fig. 3 is the part of the motor internal contracting brake control system for another building hoist that another embodiment of the application provides
Structure diagram；
Fig. 4 is that the motor internal contracting brake Control system architecture for another building hoist that another embodiment of the application provides shows
It is intended to；
Fig. 5 is that the motor internal contracting brake Control system architecture for another building hoist that another embodiment of the application provides shows
It is intended to；
Fig. 6 is that the motor internal contracting brake Control system architecture for another building hoist that another embodiment of the application provides shows
It is intended to；
Fig. 7 is that the motor internal contracting brake Control system architecture for another building hoist that another embodiment of the application provides shows
It is intended to；
Fig. 8 is the part of the motor internal contracting brake control system for another building hoist that another embodiment of the application provides
Structure diagram；
Fig. 9 is a kind of signal waveform of the motor internal contracting brake control system for building hoist that another embodiment of the application provides
Figure；
Figure 10 is the letter of the motor internal contracting brake control system for another building hoist that another embodiment of the application provides
Number oscillogram；
Figure 11 is the motor internal contracting brake Control system architecture for another building hoist that another embodiment of the application provides
Schematic diagram.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment belongs to the scope of protection of the invention.
The present invention provides a kind of motor internal contracting brake control system of building hoist, with solve cost of the prior art compared with
The problem of high and band-type brake output voltage is with voltage ripple of power network.
Specifically, the motor internal contracting brake control system of the building hoist, as shown in Figure 1, including：
Control unit 201；
The motor for being connected between power grid input terminal and the band-type brake coil of band-type brake motor and being connected with control unit 201 is embraced
Lock braking power 202；
Wherein, motor internal contracting brake braking power 202 includes：
The voltage sampling circuit 221 being connected with control unit 201；
The controlled rectification driving circuit 222 being connected with control unit 201；
The controlled rectification circuit 223 being connected in series between the band-type brake coil of the input power and the band-type brake motor.
Specifically operation principle is：
The input voltage and phase or output voltage of 221 sample motor brake sticking brake power supply 202 of voltage sampling circuit and
Phase generates simultaneously output voltage sampled signal.
Control unit 201 receives the voltage sampling signal, and according to default band-type brake output voltage and the voltage sample
Signal obtains the angle of flow, is generated according to the angle of flow and exports pwm control signal；Preferably, the angle of flow is silicon-controlled
ON time and conduction phase；
Controlled rectification driving circuit 222 receives and according to the pwm control signal, generates and export rectification drive signal.
Controlled rectification circuit 223 receives the voltage and the rectification drive signal by power grid input terminal input, and root
It will be by defeated after the voltage commutation that the power grid input terminal inputs to the default band-type brake output voltage according to the rectification drive signal
Go out.
The motor internal contracting brake control system of the building hoist provided in this embodiment is realized by the above process for applying
The band-type brake control of the band-type brake motor of work elevator, when the voltage fluctuation of power grid input terminal output, the voltage sampling signal meeting
It fluctuates therewith, but control unit 201 can be according to obtaining the default band-type brake output voltage and the voltage sampling signal
The angle of flow generates further according to the angle of flow and exports the pwm control signal, 222 basis of control controlled rectification driving circuit
The pwm control signal generates and exports the rectification drive signal, then will be defeated by the power grid by controlled rectification circuit 223
Enter the voltage of end input according to being exported after the rectification drive signal rectification to the default band-type brake output voltage, finally so that institute
Stating the voltage of motor internal contracting brake braking power output will not follow the voltage by power grid input terminal input to be fluctuated, and then
It ensure that the safe internal contracting of the band-type brake motor of the building hoist and declutch.Meanwhile the construction lifting that the application provides
The motor internal contracting brake control system of machine is without Industrial Frequency Transformer, so reducing cost compared with prior art.
Preferably, the power grid input terminal is used to connect power grid AC380V；In specific practical application, it can get access to grid
Two firewires.
What deserves to be explained is in specific practical application, motor internal contracting brake control system such as Fig. 1 of the building hoist
It is shown, including：It is control unit 201 and motor internal contracting brake braking power 202 and master controller of the prior art 203, described
Keyboard 204 and driving unit 205 in the frequency converter of building hoist, the band-type brake being connected with the band-type brake coil of the band-type brake motor
Coil freewheeling circuit 206.
Control unit 201 can be the control unit in the frequency converter of the building hoist or be applied with described
The newly-increased control unit that original control unit in the frequency converter of work elevator is connected, is not specifically limited herein.
In specific practical application, control unit 201 performs receiving voltage sampled signal, and is exported according to default band-type brake
Voltage and the voltage sampling signal obtain the angle of flow, when being generated according to the angle of flow and exporting pwm control signal step, tool
Body is used for：
It receives and according to the voltage sampling signal, obtains the voltage value and phase of the voltage sampling signal respectively；
According to the default band-type brake output voltage, the voltage value and the phase, the angle of flow is obtained；
According to the angle of flow, angle of flow PWM is calculated；
It is generated according to the angle of flow PWM and exports the pwm control signal.
At this point, as shown in Fig. 2, control unit 201 includes：
Analog quantity acquiring unit 211, phase acquiring unit 212；
The angle of flow PWM computing units 213 being connected with analog quantity acquiring unit 211 and phase acquiring unit 212；
The PWM output units 214 being connected with angle of flow PWM computing units 213.
Analog quantity acquiring unit 211 obtains the voltage value for reception and according to the voltage sampling signal.
Phase acquiring unit 212 obtains the phase for reception and according to the voltage sampling signal.
Angle of flow PWM computing units 213 utilize the angle of flow just for receiving the voltage value and the voltage-phase
String function is equal to the mode of average voltage level after being integrated, the angle of flow is calculated；According to the angle of flow, it is calculated and leads
Current flow angle PWM.
PWM output units 214 are for reception and are generated according to the angle of flow PWM and export the pwm control signal.
When the keyboard further includes display screen, control unit 201 can also include display unit.
Master controller 203 and keyboard 204 are used to be generated according to user's operation and export the operational order.Specific
In, master controller 203 is connected with a control stick, and user operates the control stick, realizes and is applied for described
The start and stop gearshift order of work elevator operation gives.
Control unit 201 receives and according to the operational order that master controller 203 and keyboard 204 export, generates and export
Driving control signal and other control signals.Wherein, the driving control signal makes driving for exporting to driving unit 205
Unit 205 controls the band-type brake motor operation of the building hoist according to the driving control signal.
Preferably, keyboard 204 is：LED keyboards, liquid crystal keyboard or LCD keyboards, for tuning parameter and display frequency conversion
Output frequency voltage and current band-type brake voltage value.In specific application, keyboard 204 can be specifically used for environment according to it and
It is fixed, it is not specifically limited herein.
Band-type brake coil freewheeling circuit 206 is used to be declutched needs according to band-type brake, is discharged in time in the motor in band-type brake moment
Band-type brake coil on voltage, ensure that the motor is timely realized and declutch.
Preferably, as shown in figure 3, band-type brake coil freewheeling circuit 206 includes：
The first resistor R1 and the first diode D1 being connected in series；The series via of first resistor R1 and the first diode D1
Both ends of the both ends respectively with the band-type brake coil 261 of the band-type brake motor be connected.
When motor internal contracting brake braking power 202 is without output voltage, band-type brake coil 261 passes through the electricity of the first diode D1 and first
Hinder R1 afterflows.The position of the first diode D1 and first resistor R1 is also interchangeable in Fig. 2.
Master controller 203, keyboard 204, driving unit 205 and band-type brake coil freewheeling circuit 206 in the present embodiment,
Belong to the prior art, details are not described herein again.
Preferably, the controlled rectification circuit be half-controlled rectifier circuit, the controlled rectification driving circuit using optocoupler every
From, transformer isolation or the topological structure of relay isolation.
In specific practical application, the controlled rectification driving circuit may be employed light-coupled isolation, transformer isolation or
The topological structure of relay isolation, is not specifically limited herein, can be depending on its concrete application environment.
Preferably, as shown in figure 4, voltage sampling circuit 221 be connected to the power grid input terminal and control unit 201 it
Between, for sampling by the voltage and phase of power grid input terminal input, generate and export the voltage sampling signal；The electricity
Sampled signal is pressed to include the voltage value and phase of input voltage of motor internal contracting brake braking power 202；
Formula is used by control unit 201 obtains the angle of flow according to the voltage sampling signal：
Wherein, VavFor the default band-type brake output voltage, VpeakPeak value for the voltage inputted by the power grid input terminal,
π-x are the angle of flow, and θ is the input phase of the power grid input terminal.
According to above-mentioned formula, by can be calculated：
Then the radian of the silicon-controlled angle of flow calculates as follows：
In specific application, the default band-type brake output voltage is determined by the characteristic of band-type brake coil, for described
The band-type brake motor of building hoist is usually 195VDC.
Alternatively, as shown in figure 5, voltage sampling circuit 221 is connected to the output terminal and control unit of controlled rectification circuit 223
Between 201, for the output voltage and phase of sample motor brake sticking brake power supply 202, generate and export the voltage sample letter
Number；The voltage sampling signal includes the voltage value and phase of the output voltage of motor internal contracting brake braking power 202；
Control unit 201 performs when obtaining the step of the angle of flow according to the voltage sampling signal, is specifically used for：According to institute
The difference between the actual value of the output voltage included in voltage sampling signal and the default band-type brake output voltage is stated, is adjusted
The angle of flow is saved, until the difference is zero, obtains the angle of flow.
Preferably, as shown in fig. 6, motor internal contracting brake braking power 202 further includes：
The first normal open switch 224 being connected between the band-type brake coil of controlled rectification circuit 223 and the band-type brake motor；
The first switch control circuit 225 being connected between the control terminal of the first normal open switch 224 and control unit 201.
Preferably, as shown in fig. 7, motor internal contracting brake braking power 202 further includes：
The second normal open switch 226 being connected between the power grid input terminal and controlled rectification circuit 223；
The second switch control circuit 227 being connected between the control terminal of the second normal open switch 226 and control unit 201.
In specific practical application, normal open switch 224 can be contactor or relay, not do specific limit herein
It is fixed.
Fig. 6 and Fig. 7 is by taking voltage sampling circuit 221 is connected between control unit 201 and the power grid input terminal as an example
It is shown, in specific practical application, voltage sampling circuit 221 can also be connected to control unit 201 and controlled rectification
Between the output terminal of circuit 223, it is not specifically limited herein.
Specifically operation principle is：
The signal that first switch control circuit 225 is exported according to control unit 201 controls the conducting of the first normal open switch 224
Or shut-off.The signal that second switch control circuit 227 is exported according to control unit 201 controls the conducting of the second normal open switch 226
Or shut-off.In specific application, first switch control circuit 225 and second switch control circuit 227 belong to the prior art,
It can be additionally used in the electic protection for realizing the motor internal contracting brake control system for the building hoist.
First normal open switch 224 and the second normal open switch 226 can be such that controlled rectification circuit 223 receives by institute when being both turned on
State the voltage of power grid input terminal input.Specifically, when the first normal open switch 224 and the second normal open switch 226 are both turned on, motor is embraced
Lock braking power 202 provides band-type brake coil of the band-type brake power supply to the band-type brake motor, and motor declutches, and motor can be run at this time；The
When one normal open switch 224 and the second normal open switch 226 are turned off, motor internal contracting brake braking power 202 does not provide band-type brake power supply to institute
The band-type brake coil of band-type brake motor is stated, band-type brake motor internal contracting brake is out of service.
In specific practical application, as shown in figure 8, controlled rectification circuit 223 includes：
The the first diode D1 and the second diode D2 being connected in series, one end phase of tie point and the power grid input terminal
Even；
The 3rd diode D3 and controllable silicon SCR being connected in series, tie point are connected with the other end of the power grid input terminal；
The cathode connection of two series vias is the cathode output end of controlled rectification circuit 223, and described two series connection are logical
The anode tie point on road is the cathode output end of controlled rectification circuit 223, and the control terminal of controllable silicon SCR and controlled rectification driving are electric
The output terminal on road 222 is connected.
Specifically operation principle is：
The voltage V inputted by the power grid input terminalL11-L12, controlled rectification circuit 223 output voltage Vdc and described lead
Angle control signal BRK_PWM oscillograms are as shown in Figure 9：The voltage V inputted by the power grid input terminalL11-L12During positive half cycle,
Output voltage Vdc determines that (the SIN function rms voltage containing the angle of flow carries out integration and is equal to averagely by thyristor operating angle
Threshold voltage can calculate the angle of flow), when the conduction angle control signal BRK_PWM is high level, the first diode D1 and controllable
Silicon SCR is turned on, the voltage V inputted by the power grid input terminalL11-L12Positive half cycle and when controllable silicon SCR does not turn on, described armful
The band-type brake coil of lock motor passes through the second diode D2 and the first diode D1 afterflows；The voltage inputted by the power grid input terminal
VL11-L12During negative half period, the second diode D2 and the 3rd diode D3 conductings.In the first diode D1 shown in Fig. 8, the two or two
In the controlled rectification circuit that pole pipe D2, the 3rd diode D3, controllable silicon SCR are formed, controllable silicon SCR can also be placed on the one or two pole
Pipe D1, the second diode D2, any position of the 3rd diode D3；In fig.9, the voltage inputted by the power grid input terminal
VL11-L12During the negative half period in each cycle, once the angle of flow, controllable silicon SCR can also be in each two cycles for controllable silicon SCR
One of negative half period once angle of flow, waveform refers to Figure 10, and (the SIN function rms voltage containing the angle of flow is accumulated
The angle of flow can be calculated in mean voltage by grading)；Controllable silicon SCR can also be wherein the one of every three, four or five cycles
A negative half period once angle of flow, is not specifically limited herein.
Two normal open switch 224 can play double protection, when one of normal open switch 224 sticks together,
Another normal open switch 224 can also act, and ensure that normal open switch 224 can realize its function.
In specific practical application, as shown in figure 11, control unit 201 be in the frequency converter of the building hoist
The connected newly-increased control unit of original control unit 200.
Wherein, original control unit 200 generates for reception and according to the operational order and exports the drive control
Signal and other signals；Control unit 201 generates for reception and according to voltage sampling signal and exports pwm control signal.
In addition, the motor internal contracting brake control system of the building hoist as shown in Figure 1, including：
Control unit 201, motor internal contracting brake braking power 202, master controller 203, keyboard 204, driving unit 205 and embrace
Brake cable circle freewheeling circuit 206.
Motor internal contracting brake braking power 202 can also use way of realization as shown in Figure 6, including：
Voltage sampling circuit 221, controlled rectification driving circuit 222, controlled rectification circuit 223, normal open switch 224 and switch
Control circuit 225.
At this time original control unit 200 in the present embodiment respectively with keyboard 204, master controller 203, driving unit
205 are connected with first switch control circuit 225；Control unit 201 is electric with voltage sampling circuit 221 and controlled rectification driving respectively
Road 222 is connected.
Preferably, original control unit 200 is additionally operable to the voltage sampling signal of the forwarding of reception control unit 201, and exports
To the keyboard.At this point, original control unit 200 is also connected with control unit 201, can mutually communicate between the two, at this time
The keyboard can include display screen, the band-type brake that the display screen is gathered by original 200 reception control unit 201 of control unit
Output voltage is simultaneously shown.
Preferably, control unit 201 is additionally operable to：It generates and exports and display signal to the keyboard.
At this point, control unit 201 further includes display unit.The display signal includes：Frequency conversion output frequency voltage, debugging
Parameter and current band-type brake voltage value.The current band-type brake voltage value can be with for the band-type brake output voltage.
Each embodiment is described by the way of progressive in the present invention, the highlights of each of the examples are with other realities
Apply the difference of example, just to refer each other for identical similar portion between each embodiment.For device disclosed in embodiment
Speech, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related part is referring to method part illustration
.
It the above is only the preferred embodiment of the present invention, make skilled artisans appreciate that or realizing of the invention.It is right
A variety of modifications of these embodiments will be apparent to one skilled in the art, general original as defined herein
Reason can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention will not
Be intended to be limited to the embodiments shown herein, and be to fit to it is consistent with the principles and novel features disclosed herein most
Wide scope.
Claims (10)
1. a kind of motor internal contracting brake control system of building hoist, which is characterized in that including：It is defeated to be connected to power grid for control unit
Enter the motor internal contracting brake braking power being connected between end and the band-type brake coil of band-type brake motor and with described control unit；Wherein：
The motor internal contracting brake braking power includes：The voltage sampling circuit being connected with described control unit, for sampling by described
The voltage and the output voltage and phase of phase or the motor internal contracting brake braking power of power grid input terminal input, generate and export
Voltage sampling signal；
Described control unit is used to receive the voltage sampling signal, and according to default band-type brake output voltage and the voltage sample
Signal obtains the angle of flow, is generated according to the angle of flow and exports pwm control signal；
The motor internal contracting brake braking power further includes：
The controlled rectification driving circuit being connected with described control unit, for receiving and according to the pwm control signal, generating simultaneously
Export rectification drive signal；
The controlled rectification circuit being connected between the band-type brake coil of the power grid input terminal and the band-type brake motor, it is described controllable whole
The control terminal of current circuit is connected with the output terminal of the controlled rectification driving circuit；The controlled rectification circuit is described for receiving
Rectification drive signal, and will be preset according to the rectification drive signal by the voltage commutation that the power grid input terminal inputs to described
It is exported after band-type brake output voltage.
2. the motor internal contracting brake control system of building hoist according to claim 1, which is characterized in that the angle of flow is
Silicon-controlled ON time and conduction phase.
3. the motor internal contracting brake control system of building hoist according to claim 1, which is characterized in that the power grid input
It holds to connect power grid AC380V.
4. the motor internal contracting brake control system of building hoist according to claim 1, which is characterized in that the controlled rectification
Circuit is half-controlled rectifier circuit, and the controlled rectification driving circuit is using light-coupled isolation, transformer isolation or relay isolation
Topological structure.
5. the motor internal contracting brake control system of building hoist according to claim 1, which is characterized in that the voltage sample
Circuit is connected between the power grid input terminal and described control unit, for sampling the voltage inputted by the power grid input terminal
And phase, it generates and exports the voltage sampling signal；Described control unit obtains the angle of flow according to the voltage sampling signal
Used formula is：
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<mi>e</mi>
<mi>a</mi>
<mi>k</mi>
</mrow>
</msub>
<mi>s</mi>
<mi>i</mi>
<mi>n</mi>
<mi>&theta;</mi>
<mi>d</mi>
<mi>&theta;</mi>
<mo>+</mo>
<msubsup>
<mo>&Integral;</mo>
<mi>x</mi>
<mi>&pi;</mi>
</msubsup>
<msub>
<mi>V</mi>
<mrow>
<mi>p</mi>
<mi>e</mi>
<mi>a</mi>
<mi>k</mi>
</mrow>
</msub>
<mi>s</mi>
<mi>i</mi>
<mi>n</mi>
<mi>&theta;</mi>
<mi>d</mi>
<mi>&theta;</mi>
</mrow>
<mrow>
<mn>2</mn>
<mi>&pi;</mi>
</mrow>
</mfrac>
<mo>;</mo>
</mrow>
Wherein, VavFor the default band-type brake output voltage, VpeakPeak value for the voltage inputted by the power grid input terminal, π-x
For the angle of flow, θ is the input phase of the power grid input terminal.
6. the motor internal contracting brake control system of building hoist according to claim 1, which is characterized in that the voltage sample
Circuit is connected between output terminal and the described control unit of the controlled rectification circuit, for sampling the motor internal contracting brake braking
The output voltage and phase of power supply generate and export the voltage sampling signal；The voltage sampling signal includes the motor
The voltage value and phase of the output voltage of brake sticking brake power supply；
When described control unit execution obtains the step of the angle of flow according to the voltage sampling signal, it is specifically used for：According to described
Difference between the actual value of the output voltage included in voltage sampling signal and the default band-type brake output voltage is adjusted
The angle of flow until the difference is zero, obtains the angle of flow.
7. the motor internal contracting brake control system of building hoist according to any one of claims 1 to 6, which is characterized in that described
Motor internal contracting brake control system further includes keyboard, and the keyboard is：LED keyboards, liquid crystal keyboard or LCD keyboards are joined for debugging
Number and display frequency conversion output frequency voltage and current band-type brake voltage value.
8. the motor internal contracting brake control system of building hoist according to any one of claims 1 to 6, which is characterized in that with institute
Stating the band-type brake coil freewheeling circuit that the band-type brake coil of band-type brake motor is connected includes：
The first resistor being connected in series and the first diode；The two of the first resistor and the series via of first diode
The both ends respectively with the band-type brake coil of the band-type brake motor is held to be connected.
9. the motor internal contracting brake control system of building hoist according to any one of claims 1 to 6, which is characterized in that described
Motor internal contracting brake braking power further includes：
The first normal open switch being connected between the band-type brake coil of the controlled rectification circuit and the band-type brake motor；
The first switch control circuit being connected between the control terminal and described control unit of first normal open switch.
10. the motor internal contracting brake control system of building hoist according to claim 9, which is characterized in that the motor is embraced
Lock braking power further includes：
The second normal open switch being connected between the power grid input terminal and the controlled rectification circuit；
The second switch control circuit being connected between the control terminal and described control unit of second normal open switch.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106379830B (en) * | 2016-09-18 | 2018-12-04 | 广州广日电气设备有限公司 | Elevator internal contracting brake control device |
| CN108115709A (en) * | 2016-11-26 | 2018-06-05 | 沈阳新松机器人自动化股份有限公司 | Control box and solution band-type brake security system |
| CN108858206A (en) * | 2018-09-04 | 2018-11-23 | 珠海格力智能装备有限公司 | Band-type brake control device and system of robot and band-type brake control method of robot |
| CN109167339B (en) * | 2018-09-25 | 2024-12-03 | 北京卓立汉光仪器有限公司 | Automatic power-off brake controller, device and control method |
| CN110880904A (en) * | 2019-10-16 | 2020-03-13 | 珠海格力电器股份有限公司 | Servo motor and method for automatically eliminating back electromotive force of band-type brake |
| WO2021127805A1 (en) * | 2019-12-23 | 2021-07-01 | 深圳市英威腾电气股份有限公司 | Functional safety device for frequency converter |
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| CN2582244Y (en) * | 2002-11-15 | 2003-10-22 | 许德球 | power-saving protector for three-phase asynchronous motor |
| CN101425756A (en) * | 2008-07-30 | 2009-05-06 | 东元总合科技（杭州）有限公司 | DC lateral voltage controllable 4 quadrant frequency transformer and method thereof |
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