CN103166570A - Motor control device - Google Patents
Motor control device Download PDFInfo
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- CN103166570A CN103166570A CN2012105173879A CN201210517387A CN103166570A CN 103166570 A CN103166570 A CN 103166570A CN 2012105173879 A CN2012105173879 A CN 2012105173879A CN 201210517387 A CN201210517387 A CN 201210517387A CN 103166570 A CN103166570 A CN 103166570A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
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- Control Of Ac Motors In General (AREA)
- Inverter Devices (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention provides a motor control device, which monitors electric power consumption of a machine tool. The motor control device (100) comprises a phase detecting circuit (35) which detects a multi-phase AC voltage of a multi-phase power supply, a selector circuit (50) which selects AC current of a specific phase based on the phase detected by the phase detecting circuit (35) and shifts the AC current into DC current, an averaging circuit (60) which equalizes the DC current shifted by the selector circuit to generate an average DC current, a coefficient multiply circuit (110) which uses the average DC current to multiply the coefficient, an electric power operational circuit (120) which multiplies the average DC current multiplied with the coefficient in the coefficient multiply circuit with a DC current at a loading side of a convertor unit, and an electric power accumulating circuit (140) which conducts integration on the electric power calculated by the electric power accumulating circuit according to time to calculate the accumulated electric power.
Description
Technical field
The present invention relates to possess the control device of electric motor of electrical power monitoring function.
Background technology
In recent years, in factory, require the consumes power in factory is more strictly managed.Therefore, the consumes power of the set machine-tool of factory is monitored individually.For example, in electric injection molding device or machine-tool, in order to grasp the consumes power of this machine tool, be designed with the electrical power monitoring function in the control device of electric motor of the action of controlling this machine tool.
The control device of electric motor of the uses such as electric injection molding device usually possesses alternating current is carried out the converter (コ Application バ one タ) of rectification, a plurality of inverters of drive motor.Method as with control device of electric motor monitoring consumes power for example has following four kinds of methods: first to fourth kind of method.
At first, first method is that ammeter is set in control device of electric motor, utilizes this ammeter to grasp the method for the consumes power of machine-tool.
Secondly, second method is as disclosed method in following patent documentation 1, namely, obtain respectively the loss electrical power, the constant drain electrical power of machine-tool of amplifier of consumption of electric power, the drive motor of motor by computing, each electrical power of obtaining is carried out integration by the time, grasp the consumes power of machine-tool.
The third method is as disclosed method in following patent documentation 2, that is, detect magnitude of voltage and current value between converter and inverter, will carry out integration by the time based on the magnitude of voltage that detects and the electrical power of current value computing, thus, grasp the consumes power of machine-tool.
At last, the 4th kind of method is as disclosed method in following patent documentation 3, detect magnitude of voltage and current value between three-phase alternating current source and pwm converter, according to the magnitude of voltage that detects and current value computing consumption of electric power and regeneration electrical power, grasp the consumes power of machine-tool.
Patent documentation 1: TOHKEMY 2010-115063 communique
Patent documentation 2: TOHKEMY 2002-192588 communique
Patent documentation 3: TOHKEMY 2010-110936 communique
But, in the situation that first method because needs arrange ammeter in addition, has increased the parts number of packages and the cost that consist of the parts of control device of electric motor.
In the situation that second method, for the consumption of electric power of obtaining motor, the electrical power such as loss electrical power of amplifier, need to obtain many parameters such as coil resistance, amplifier electric power loss ratio of torque constant, the motor of motor and store.In addition, be connected with a plurality of inverters at converter, the machine of the motor that is connected with inverter has in multiple situation, need to each obtain other parameter and store each motor.At it on the other hand, due to the iron loss of not considering motor and machine tool loss, the accuracy of detection of talkative consumption of electric power is not high.
In the situation that the third method, the magnitude of voltage between needs detection converter and inverter and the detector of current value.Generally, the detector that detects electric current is not set in the converter that only carries out rectification.Like this, because the detector that detects electric current need to be set in addition, so increased parts number of packages and the cost that consists of the parts of control device of electric motor.
In the situation that the 4th kind of method, 120 ° of energising power supply regenerative converters for general do not arrange the detector that detects three-phase alternating voltage for cost degradation.Like this, because the detector that detects three-phase alternating voltage need to be set in addition, so increased parts number of packages and the cost that consists of the parts of control device of electric motor.
Summary of the invention
The present invention completes in order to solve existing unfavorable problem as above, purpose is to provide a kind of control device of electric motor, it has many parameters such as not using motor constant, be not provided for the special detector of computing electrical power yet, but in 120 ° of energising power supply regenerative converters, utilize the existing detector that arranges for convertor controls just can monitor the electrical power monitoring function of consumption of electric power.
Have the power converter cells that is connected with polyphase source and the inverter unit that is connected with motor for the control device of electric motor of the present invention that solves above-mentioned problem, power converter cells and inverter unit cooperate to control driving and the regeneration of motor.
Control device of electric motor has phase detecting circuit, selector circuit, averaging circuit, coefficient mlultiplying circuit, electrical power computing circuit, electrical power accumulative total circuit.Phase detecting circuit, selector circuit, averaging circuit utilization are for the driving of control change device and regeneration and the available circuit that arranges.
Phase detecting circuit detects the phase place of the polyphase ac voltage of polyphase source.Selector circuit is selected the alternating current of specific phase and converts thereof into direct current according to the phase place that phase detecting circuit detects.Averaging circuit averages the direct current of selector circuit conversion and obtains average DC current.By the action of selector circuit and averaging circuit, from based on the phase place of polyphase ac voltage and the alternating current of the specific phase of selecting can be obtained average DC current.
The coefficient mlultiplying circuit multiply by coefficient to the average DC current of obtaining with averaging circuit.The electrical power computing circuit will multiply each other and the computing electrical power at the direct voltage that the coefficient mlultiplying circuit multiply by the load-side of the average DC current of coefficient and power converter cells.Electrical power accumulative total circuit will carry out integration by the time and computing accumulative total electrical power in the electrical power of electrical power computing circuit computing.
The invention effect
According to the present invention who consists of as mentioned above, can use existing phase detecting circuit, selector circuit, averaging circuit to obtain from the average DC current of multi-phase AC power supply, the average DC current that use is obtained and the direct voltage of power converter cells load-side are obtained the accumulative total electrical power.
Thereby, do not use many parameters such as motor constant, be not provided for the special detector of computing electrical power yet, but utilize the existing detector that arranges for convertor controls just can monitor consumption of electric power.
Description of drawings
Fig. 1 is the calcspar of the control device of electric motor of present embodiment;
Fig. 2 is to provide the oscillogram to the action specification of control device of electric motor shown in Figure 1;
Fig. 3 is to provide the oscillogram to the action specification of control device of electric motor shown in Figure 1.
Symbol description
10R, 10S, 10T reactor
20 power converter cells
25 capacitors
30 inverter units
40 electric currents are selected signal generating circuit
45R, 45S current detector
50 selector circuits
55 edge detect circuits (エ Star ジ detecting circuit)
60 averaging circuits
65 polarity determination circuits
70 stop signals produce circuit
75 supply voltage wave height value testing circuits
80 regeneration beginning testing circuits
85 gate signal generative circuits
100 control device of electric motor
110 coefficient mlultiplying circuits
120 electrical power computing circuits
130 filter circuits
140 electrical power accumulative total circuit
200 three-phase alternating-current supplies
300 motor
Embodiment
Below, the control device of electric motor of present embodiment is described.Fig. 1 is the calcspar of the control device of electric motor of present embodiment.
［ formation of control device of electric motor ］
In order to supply electric power to motor 300, control device of electric motor 100 possesses reactor 10R, 10S, 10T, power converter cells 20, capacitor 25, inverter unit 30.
Capacitor 25 uses electrolytic capacitor capacious, and makes the direct current smoothing of power converter cells 20 outputs.
Control device of electric motor 100 is when the driving of motor 300 and when regeneration, the following action substantially.
When drive motor 300, the alternating current of supplying from three phase mains 200 temporarily converts direct current to by power converter cells 20, and forms roughly direct current completely with capacitor 25.And then direct current is converted to the alternating current of desired frequency, voltage by inverter unit 30, and with this alternating current drive motor 300.
On the other hand, when using the regeneration of current of motor 300 generatings, the alternating current that generates electricity with motor 300 converts direct current to by inverter unit 30.And then direct current is converted to the interchange of commercial frequency, voltage by power converter cells 20, regenerate towards three phase mains 200.
In addition, in the present embodiment, by making six thyristors that power converter cells 20 comprises with 120 ° of conduction mode conductings, use the regeneration of the electric current of motor 300 generatings.
Control device of electric motor 100 is by the igbt 20A of control change device unit 20 and inverter unit 30, the conversion of 30A, when coming the regeneration of regulating electric machine 300 and the electric current in when driving.
In order to control the conversion of igbt 20A, 30A, control device of electric motor 100 possesses: phase detecting circuit 35, electric current select signal generating circuit 40, current detector 45R, 45S, selector circuit 50, edge detect circuit 55, averaging circuit 60, polarity determination circuit 65, stop signal to produce circuit 70, supply voltage wave height value testing circuit 75, regeneration beginning testing circuit 80, gate signal generative circuit 85.
Electric current selects signal generating circuit 40 to generate electric current selection signal S3 based on the phase signal S4 of phase detecting circuit 35 outputs.Electric current selects signal S3 to select the signal of the alternating current of specific phase for the alternating current of distinguishing from three-phase (three-phase separate exchanges Electricity stream).
The electric current that selector circuit 50 selects signal generating circuit 40 to generate based on electric current is selected signal S3, from the three-phase alternating current that detects by current detector 45R, 45S and further obtain by computing, select R phase, S phase, T phase ,-the R phase ,-the S phase ,-the T phase.Thereby the selection of the alternating current that is undertaken by selector circuit 50 is equivalent to carries out the AC-DC conversion to the alternating current from three phase mains 200 supplies.Thereby, can the so simple formation of enough selector circuits 50 convert alternating current to direct current.
Edge detect circuit 55 detects the edge that electric current is selected signal S3, and exports timing signal according to the detection at edge.Be to detect the edge that electric current is selected signal S3 in the present embodiment, export timing signal but also can detect from the edge of the phase signal S4 of phase detecting circuit 35 outputs.
Averaging circuit 60 is based on the timing signal of edge detect circuit 55 output, will be averaged by the current value that selector circuit 50 is selected and obtains average DC current.Thereby, averaging circuit 60 with R phase, S phase, T phase ,-the R phase ,-the S phase ,-alternating current of T phase averages successively.
In addition, for the control change device, phase detecting circuit 35, electric current select signal generating circuit 40, current detector 45R, 45S, selector circuit 50, edge detect circuit 55, averaging circuit 60 to use the circuit of being located in control device of electric motor 100.
Whether polarity determination circuit 65 becomes 0 according to the average DC current value from averaging circuit 60 outputs, perhaps the polarity of average DC current be from+become-, or from-become+, judge whether motor 300 shifts or shift to driving from regeneration from driving to regeneration.
When the judgement demonstration of polarity determination circuit 65 was transferred to driving from regeneration, stop signal produced circuit 70 output stop signal S2.
The wave height value of the supply voltage that 75 pairs of supply voltage wave height value testing circuits are added to three-phase alternating voltage on three-phase power line R, S, T after carrying out full-wave rectification and detecting full-wave rectification.
The direct voltage of 80 pairs of power converter cells of regeneration beginning testing circuit, 20 outputs and comparing with the wave height value of the supply voltage after the full-wave rectification of high value testing circuit 75 detections of power supply voltage wave.When the high approximately 15V of wave height value of the supply voltage after the DirectCurrent Voltage Ratio full-wave rectification of power converter cells 20 output, regeneration beginning testing circuit 80 is judged to be and enters reproduced state, and output regeneration commencing signal S1.
Gate signal generative circuit 85 is based on the phase signal S4 of phase detecting circuit 35 outputs, to the igbt 20A out gate signal S5 that consists of power converter cells 20.In addition, gate signal generative circuit 85 is based on the regeneration commencing signal S1 of regeneration beginning testing circuit 80 outputs, to igbt 20A out gate signal S5.And then gate signal generative circuit 85 produces the stop signal S2 of circuit 70 outputs based on stop signal, stop the output of gate signal S5.
Control device of electric motor 100 makes power converter cells 20 move with the AC-DC translative mode when drive motor 300.And when motor 300 became reproduced state, control device of electric motor 100 made power converter cells 20 move with the DC-AC translative mode.
The situation that becomes reproduced state begins testing circuit 80 by regeneration and detects.When becoming reproduced state, the 20 out gate signal S5 from gate signal generative circuit 85 to power converter cells.Power converter cells 20 is controlled by gate signal S5, and igbt 20A regularly only is energized in 120 ° of intervals according to power phase.Carrying out the power supply regenerative of so-called 120 ° of energisings controls.Control by power supply regenerative, the electrical power of the generating of motor 300 is regenerated in three phase mains 200.
Then, transfer to driving condition when (also comprising the situation that reproduced state finishes) when motor 300 from reproduced state, control device of electric motor 100 makes power converter cells 20 move with the AC-DC translative mode again.Polarity determination circuit 65 detects the situation that becomes driving condition.When detecting when becoming driving condition, because stop signal produces circuit 70 output stop signal S2, thus can be from gate signal generative circuit 85 out gate signal S5, and stop power supply regenerative.
In order to monitor the consumption of electric power of control device of electric motor 100 and motor 300, control device of electric motor 100 possesses coefficient mlultiplying circuit 110, electrical power computing circuit 120, filter circuit 130, electrical power accumulative total circuit 140.
The direct current that electrical power computing circuit 120 will be inferred with coefficient mlultiplying circuit 110 and the direct voltage of converter 20 multiply each other and the computing electrical power.
Filter circuit 130 is low pass filters that the radio-frequency component with the electrical power waveform of electric power computing circuit 120 computings disappears and.
The electrical power waveform that there is no noise (noise) that electrical power accumulative total circuit 140 will pass through filter 130 carry out time integral calculate with control device of electric motor 100 be fed to the electric weight of motor 300, accumulative total electric weight after being added up to by the electric weight of the electric weight of motor 300 regeneration, control device of electric motor 100 autophages.The accumulative total electric weight of institute's computing is output to outside device.
In addition, also can carry out full-wave rectification and calculate the mean value of supply voltage the three-phase mains voltage of three phase mains 200, and the direct current that the mean value of supply voltage is multiplied by value after coefficient and institute's equalization is multiplied by value after coefficient carries out multiplication and calculate, by filter circuit 130 arithmetic average electrical power.
In addition, reactor 10R, 10S, 10T also can be configured to than current detector 45R, 45S more by mains side.In the present embodiment, a power converter cells 20 is connected with an inverter unit 30, even but power converter cells 20 is connected with the mode of many inverter units 30, also can carry out the computing of consumption of electric power.
Control device of electric motor 100 detects the electric current that flows through three phase mains 200, the electric current of its detection be multiply by coefficient and infer the DC current values of power converter cells 20 outputs, the DC current values of inferring be multiply by the output voltage of power converter cells 20 and the arithmetic average electrical power.And, carry out integration by the average electrical power to computing by the time, obtain correct consumption of electric power.
In addition, each circuit that consists of the control device of electric motor 100 of present embodiment also can consist of with hardware, or also can form with the inside of software at microcomputer etc.
［ action of control device of electric motor ］
Then, with reference to Fig. 2 and Fig. 3, the concrete action of control device of electric motor 100 is described.Fig. 2 and Fig. 3 are to provide the oscillogram to the action specification of control device of electric motor shown in Figure 1.
Waveform shown in Fig. 2 (A) is that three phase mains 200 is added to respectively supply voltage VR, VS, the VT on three-phase power line R, S, T.Supply voltage VR, VS, VT have 120 ° of identical voltage waveform and phase phasic differences separately.
The phase signal S4 of phase detecting circuit 35 outputs of Fig. 2 (B) presentation graphs 1.Phase detecting circuit 35 couples of three-phase power line R, S, supply voltage VR, the VS of T, VT compare, output phase signal PR1, PS1, PT1, PR2, PS2, PT2.
Supply voltage VR and supply voltage VS or supply voltage VT are compared, and than supply voltage VS or supply voltage VT when large, phase signal PR1 uprises at supply voltage VR; At supply voltage VR than supply voltage VS or supply voltage VT hour, phase signal PR1 step-down.Than supply voltage VR or supply voltage VT when large, phase signal PS1 uprises at supply voltage VS; At supply voltage VS than supply voltage VR or supply voltage VT hour, phase signal PS 1 step-down.Than supply voltage VR or supply voltage VS when large, phase signal PT1 uprises at supply voltage VT; At supply voltage VT than supply voltage VR or supply voltage VS hour, phase signal PT1 step-down.
Supply voltage VR and supply voltage VS or supply voltage VT are compared, and than supply voltage VS or supply voltage VT hour, phase signal PR2 uprised at supply voltage VR; At supply voltage VR than supply voltage VS or supply voltage VT when large, phase signal PR2 step-down.Than supply voltage VR or supply voltage VT hour, phase signal PS2 uprised at supply voltage VS; At supply voltage VS than supply voltage VR or supply voltage VT when large, phase signal PS2 step-down.Than supply voltage VR or supply voltage VS hour, phase signal PT2 uprised at supply voltage VT, at supply voltage VT than supply voltage VR or supply voltage VS when large, phase signal PT2 step-down.
Thereby phase signal PR1, PS1, PT1 represent the interval that the supply voltage of each phase is larger than the voltage of other phases, the supply voltage that phase signal PR2, PS2, PT2 represent each phase at minus side (minus Side) than the large interval of the voltage of other phases.
When motor 300 is driven, to the three-phase ac power from three phase mains 200, fly-wheel diode (freewheel diode) 20D with power converter cells 20 carries out rectification, to capacitor 25 and inverter unit 30 outputs, convert the direct current power after rectification to alternating electromotive force and drive motor 300.When motor 300 accelerated, the direct voltage of power converter cells 20 outputs reduced as shown in Fig. 3 (A) lentamente, and the average DC current of exporting from averaging circuit 60 little by little increases.Thereafter, when motor 300 became the constant speed state, the value of average DC current became constant.The action back that be used for to obtain the average DC current value is described.When drive motor 300, gate signal generative circuit 85 stops action.
When motor 300 regeneration, the direct voltage of power converter cells 20 outputs raises as shown in Fig. 3 (A) gradually.The wave height value of the supply voltage that the DirectCurrent Voltage Ratio supply voltage wave height value testing circuit 75 of power converter cells 20 outputs detects is high.Regeneration beginning testing circuit 80 output regeneration commencing signal S1.
When regeneration commencing signal S1 was transfused to gate signal generative circuit 85, gate signal generative circuit 85 generated gate signal S5 based on phase signal PR1, PS1, PT1, PR2, PS2, PT2.The gate signal S5 that generates is output to power converter cells 20.
Six transistor 20A of power converter cells 20 carry out conducting according to gate signal S5 with the conduction mode of 120 °, and the electrical power of regeneration is regenerated in three phase mains 200.
The electric current that Fig. 2 (C) expression selects signal generating circuit 40 to generate with electric current is selected the content of signal S3.In Fig. 2 (C), S, R, T and-S ,-R ,-demonstration of T, the meaning is to select respectively to flow through IR, IS, IT and the reverse signal thereof of the electric current of three-phase power line R, S, T.
Flow through electric current I R, IS, the IT of each phase of three-phase power line R, the S shown in Fig. 2 (D), T, formation make electric current I R, IS, IT with each electrical degree every 120 ° of flow forms, so that power converter cells 20 is moved to the regenerate mode of electric current of each phase of three phase mains 200 sides according to 120 ° of conduction modes.
For example, the electric current of Fig. 2 (C) selects signal " S " expression to select to flow through the current IS of three-phase power line S, the situation of the polarity inversion signal of selector circuit 50 these electric currents of output.In addition, the electric current of Fig. 2 (C) selects signal " R " expression to select to flow through the electric current I R of three-phase power line R, and selector circuit 50 is directly exported the situation of this electric current.The electric current of Fig. 2 (C) selects signal " T " expression to select to flow through the electric current I T of three-phase power line T, the situation of the polarity inversion signal of selector circuit 50 these electric currents of output.Electric current selects the item of signal " S ", " R ", " T " expression to select the item of signal " R ", " T " expression with reference to above-mentioned electric current.
Fig. 2 (E) expression will be selected output by the electric current that the electric current that selector circuit 50 is selected is arranged chronologically.When having been selected the electric current of three-phase differentiation by selector circuit 50, the electric current that averaging circuit 60 is distinguished these three-phases averages and exports.
Fig. 2 (F) is the waveform of the average DC current of averaging circuit 60 outputs.Average processing during the end of input of the current value that averaging circuit 60 is distinguished at three-phase at every turn, the value of average DC current changes according to the variation of current value interimly.
The variation of Fig. 3 (B) expression average DC current during with the contraction in length of time shaft with respect to Fig. 2 (F).At regeneration period, due to electric current from motor 300 side direction three-phase alternating-current supply 200 side flow, therefore if under driving condition, when for example generating electric current and select signal S3 in the mode of the value of the average DC current of output cathode, the average DC current value when regenerating becomes negative polarity.When the rotary speed reduction of motor 300, when the regeneration electrical power reduces, therefore the value of average DC current also reduces.
In theory, can be judged to be the moment that becomes " 0 " in the value of average DC current, regeneration finishes.But near the curent change that the value of average DC current becomes " 0 " is unsettled, easily produces erroneous judgement.So, in the present embodiment, in polarity determination circuit 65, exceed predetermined value and after zero changes from the value of average DC current, in the moment of having passed through certain hour, the value of average DC current whether become 0 or its polarity whether change, determine whether from regeneration and transferred to driving.
Thereby misjudged possibility is very little in the present embodiment.Judge the value of average DC current when polarity determination circuit 65 and become 0 or when its polarity inversion being detected, stop signal produces 70, circuit and produces stop signal S2.
When producing circuit 70 output stop signal S2 from stop signal, gate signal generative circuit 85 stops the generation action of gate signal, and six transistor 20A of power converter cells 20 become off-state.After, if inverter unit 30 moves, the rectification circuit output DC power that just consists of by six diode 20D by power converter cells 20.
Fig. 3 (C) is the direct current presumed value of the power converter cells 20 that multiply by the coefficient set by the average DC current with averaging circuit 60 output obtain in coefficient mlultiplying circuit 110.When motor 300 is driven, compare the angle of elevation of the average DC current of Fig. 3 (B), it is large that the angle of elevation of the direct current presumed value of Fig. 3 (C) becomes.And when motor 300 regeneration, the angle of elevation of the direct current presumed value of the angle of elevation of the average DC current of Fig. 3 (B) and Fig. 3 (C) is roughly the same.This is because the coefficient that will set in coefficient mlultiplying circuit 110 is set as different values when the driving of motor 300 and when regenerating.
Fig. 3 (D) is the waveform by the average electrical power that obtains after filter circuit 130.Fig. 3 (E) carries out average electrical power for electric power accumulative total circuit 140 waveform of the electric weight that time integral obtains.Observing Fig. 3 (E) can be clear that, electric weight increases when motor 300 is driven, and electric weight reduces when motor 300 regeneration.
By the electric weight of electric power accumulative total circuit 140 computings is monitored, can be simply and correctly grasp the consumption of electric power of the motor 300 that comprises control device of electric motor 100 with low cost.Can grasp simply electric weight and be because needn't use many parameters such as motor constant, becoming low cost is because needn't be provided for the special detector of computing electrical power, but utilizes the existing detector that arranges for convertor controls.
As mentioned above, according to the control device of electric motor of present embodiment, can simply and correctly grasp consumption of electric power with low cost.
Claims (7)
1. control device of electric motor, it possesses the power converter cells that is connected with polyphase source and the inverter unit that is connected with motor, described power converter cells and described inverter unit cooperate to control driving and the regeneration of described motor, and described control device of electric motor comprises:
Phase detecting circuit, it detects the phase place of the polyphase ac voltage of described polyphase source;
Selector circuit, the alternating current of the specific phase of Selecting phasing that it detects according to described phase detecting circuit also converts thereof into direct current;
Averaging circuit, its direct current with the conversion of described selector circuit average and obtain average DC current;
The coefficient mlultiplying circuit, it will multiply by coefficient with the average DC current that described averaging circuit is obtained;
The electrical power computing circuit, it will multiply each other and calculate electrical power at the direct voltage that described coefficient mlultiplying circuit multiply by the load-side of the average DC current of coefficient and described power converter cells; And
Electrical power accumulative total circuit, it will carry out integration by the time and calculate the accumulative total electrical power with the electrical power that described electrical power computing circuit calculates, wherein
Described phase detecting circuit, described selector circuit, described averaging circuit are for the driving of controlling described motor and regeneration and the available circuit that arranges.
2. control device of electric motor as claimed in claim 1, wherein, described polyphase source is three phase mains, described control device of electric motor also has two current detectors that detect the alternating current that flows through the two-phase in three-phase, and the alternating current that flows through another phase in described three-phase is obtained by computing.
3. control device of electric motor as claimed in claim 2, wherein, the selection of the alternating current that described selector circuit is carried out is equivalent to carries out the AC-DC conversion to the alternating current from described polyphase source supply.
4. control device of electric motor as described in any one in claim 1～3, wherein, be provided with electric current and select signal generating circuit between described phase detecting circuit and described selector circuit,
Described electric current selects signal generating circuit based on the phase signal of described phase detecting circuit output, selects signal to described selector circuit output for the electric current of the alternating current of selecting specific phase.
5. control device of electric motor as claimed in claim 4, wherein, select to be provided with edge detect circuit between signal generating circuit and described averaging circuit at described electric current,
Described edge detect circuit detection selects the electric current of signal generating circuit output to select the edge of signal from described electric current, exports according to the detection at edge the timing signal that averages for direct current to described averaging circuit.
6. control device of electric motor as described in any one in claim 1～3, wherein, the coefficient that uses in described coefficient mlultiplying circuit is different during with regeneration when the driving of described motor.
7. control device of electric motor as described in any one in claim 1～3, wherein, described power converter cells, will be regenerated in described polyphase source with the electrical power of described motor generating with 120 ° of conduction mode conductings by the thyristor that makes described power converter cells and possess.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011271484A JP5351246B2 (en) | 2011-12-12 | 2011-12-12 | Motor control device |
| JP2011-271484 | 2011-12-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103166570A true CN103166570A (en) | 2013-06-19 |
| CN103166570B CN103166570B (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210517387.9A Active CN103166570B (en) | 2011-12-12 | 2012-12-05 | Control device of electric motor |
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| Country | Link |
|---|---|
| JP (1) | JP5351246B2 (en) |
| KR (1) | KR101724646B1 (en) |
| CN (1) | CN103166570B (en) |
| TW (1) | TWI558087B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110235354A (en) * | 2017-01-24 | 2019-09-13 | 株式会社日立产机系统 | Motor power conversion device and motor power conversion system using the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017189000A (en) * | 2016-04-05 | 2017-10-12 | 山洋電気株式会社 | Power Conditioner |
| US10050574B2 (en) * | 2016-05-06 | 2018-08-14 | The Boeing Company | Management of motor regeneration |
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| CN101339644A (en) * | 2007-07-04 | 2009-01-07 | 株式会社日立制作所 | Method and system for calculating power consumption saving effect in energy-saving operation support method |
| JP2010110936A (en) * | 2008-11-05 | 2010-05-20 | Japan Steel Works Ltd:The | Method and device for displaying electric power of electric injection molding machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110235354A (en) * | 2017-01-24 | 2019-09-13 | 株式会社日立产机系统 | Motor power conversion device and motor power conversion system using the same |
| CN110235354B (en) * | 2017-01-24 | 2023-03-21 | 株式会社日立产机系统 | Motor power conversion device and motor power conversion system using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5351246B2 (en) | 2013-11-27 |
| TWI558087B (en) | 2016-11-11 |
| CN103166570B (en) | 2016-05-04 |
| KR101724646B1 (en) | 2017-04-07 |
| KR20130066510A (en) | 2013-06-20 |
| JP2013123341A (en) | 2013-06-20 |
| TW201334394A (en) | 2013-08-16 |
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