CN104579109B - Control method of electronic commutation motor - Google Patents

Abstract

The invention discloses an electronic commutation motor and a control method thereof and an HVAC debugging system applied by the electronic commutation motor, the electronic commutation motor comprises a motor monomer and a motor controller, the motor monomer comprises a stator component, a rotor component and a shell component, the motor controller comprises a power supply unit, a detection circuit, a microprocessor, an inversion unit and an interface circuit, the electronic commutation motor also comprises a plurality of gear input lines, the gear input lines are connected with the microprocessor through the interface circuit, each gear input line represents an operation speed, the microprocessor controls the motor monomer to operate according to the selected operation speed according to the on-off control of each gear input line, the interface circuit comprises a plurality of signal conversion circuits, each gear input line is connected with one signal conversion circuit, the microprocessor receives the gear signals of the gear input line through the signal conversion circuit, at least one signal conversion circuit can receive the PWM signals and the AC signals of the gear input line, the electronic commutation motor has the advantages of simple structure, convenience in modification and debugging, low cost and high reliability.

Description

A method for controlling an electronically commutated motor

Technical field:

The invention relates to a control method of an electronic commutation motor.

Background technique:

As shown in Figure 1, the five gear positions L1, L2, L3, L4, and L5 of the existing electronically commutated motor are respectively connected to the 24V AC signal input. When any line is powered on, the interface circuit sends the gear position signal to Microprocessor, the microprocessor controls the electronically commutated motor to run at a certain speed through the inverter unit.

Electronically commutated motors used in HVAC systems, due to differences in air ducts (different static pressures) during actual installation, the air volume or torque set by the motor factory is not suitable for the situation on site, and the output torque or speed of the motor needs to be adjusted on site to achieve the desired air volume. The above-mentioned structure of the electronically commutated motor is not conducive to modifying and setting the motor on site, the cost of debugging is high, and the reliability is relatively low.

Invention content:

The purpose of the present invention is to provide a control method for electronically commutated motors. The PWM controller is used on site to adjust the torque or rotational speed output by each gear motor, which brings convenience to the on-site debugging of air volume, reduces debugging costs and has high reliability. .

The purpose of the present invention is achieved through the following technical solutions.

An electronically commutated motor, including a single motor and a motor controller, the single motor includes a stator assembly, a rotor assembly and a casing assembly, the stator assembly is installed on the casing assembly, and the rotor assembly is sleeved inside the stator assembly Or on the outside, the motor controller includes a power supply unit, a detection circuit, a microprocessor, an inverter unit and an interface circuit, the output end of the power supply unit supplies power to each part of the motor controller, and the detection circuit detects the operating data of the motor monomer And send the signal to the microprocessor for processing, the microprocessor controls the inverter circuit to drive the on-off of the motor winding on the stator assembly, it also includes a number of gear input lines, the gear input lines are connected to the microprocessor through the interface circuit, Each gear input line represents a running speed. The microprocessor controls the motor unit to run at the selected running speed according to the power on and off of each gear input line. The interface circuit includes several signal conversion circuits. Each gear The bit input line is connected to one signal conversion circuit, the microprocessor receives the gear signal of the gear input line through the signal conversion circuit, at least one signal conversion circuit can receive the PWM signal and the AC signal of the gear input line.

The number of the above-mentioned signal conversion circuits is at least three.

The above-mentioned signal conversion circuit capable of receiving PWM signals and AC signals includes a first optocoupler, a diode, a first resistor and an eleventh resistor, and the gear input line passes through the first resistor and the first pin of the first optocoupler. Connect, the second pin of the first optocoupler is grounded, the anode of the diode is connected to the second pin of the first optocoupler, the negative pole is connected between the first resistor and the first pin of the first optocoupler, the first optocoupler The fourth pin of the first optocoupler is connected to the power supply, the third pin of the first optocoupler is connected to the microprocessor, and the two ends of the eleventh resistor are respectively connected to the third pin of the first optocoupler and the ground. signal, the signal conversion circuit outputs a half-wave DC signal to the microprocessor, and when the gear position input line inputs a PWM signal, the signal conversion circuit outputs a PWM signal to the microprocessor.

An electronic commutation motor control method, the electronic commutation motor includes a motor unit and a motor controller, the motor unit includes a stator assembly, a rotor assembly and a casing assembly, and the stator assembly is installed on the casing assembly , the rotor assembly is set on the inner or outer side of the stator assembly, the motor controller includes a power supply unit, a detection circuit, a microprocessor, an inverter unit and an interface circuit, and the output end of the power supply unit supplies power to various circuits of the motor controller, The detection circuit detects the operation data of the motor unit and sends the signal to the microprocessor for processing. The microprocessor controls the inverter circuit to drive the on-off of the motor winding on the stator assembly. It also includes several gear input lines and gear input lines. It is connected with the microprocessor through the interface circuit. Each gear input line represents a running speed. The microprocessor controls the motor unit to run at the selected running speed according to the power on and off of each gear input line. The interface circuit includes Several signal conversion circuits, each gear input line is connected to one signal conversion circuit, the microprocessor receives the gear signal of the gear input line through the signal conversion circuit, and at least one signal conversion circuit can receive the PWM signal of the gear input line and AC signals, other signal conversion circuits can only receive AC signals, when the microprocessor receives various signal conversion circuits, when the signal conversion circuit inputs both PWM signals and AC signals, the microprocessor processes the PWM signals first.

The number of the above-mentioned signal conversion circuits is 5, and each signal conversion circuit can respectively receive the first PWM signal PWM1 and the first AC signal TAP1, the second PWM signal PWM2 and the second AC signal TAP2, and the third PWM signal PWM3 And the third AC signal TAP3, the fourth PWM signal PWM4 and the fourth AC signal TAP4, the fifth PWM signal PWM5 and the fifth AC signal TAP5, the priority order of each signal by the microprocessor is: PWM1>PWM2>PWM3>PWM4 >PWM5>TAP1>TAP2>TAP3>TAP4>TAP5.

An HVAC debugging system, including an air conditioner controller, a thermostat, a PWM controller, and a fan motor. The thermostat sends an ambient temperature signal to the air conditioner controller. ambient temperature and output an AC signal to the PWM controller, the PWM controller receives and processes the AC signal, the PWM controller outputs a gear signal to the motor controller, the fan motor includes a motor unit and a motor controller, and the motor unit includes Stator assembly, rotor assembly and casing assembly, the stator assembly is installed on the casing assembly, the rotor assembly is set on the inside or outside of the stator assembly, the motor controller includes a power supply unit, a detection circuit, a microprocessor, an inverter unit and an interface circuit , the output end of the power supply unit supplies power to each part of the motor controller circuit, the detection circuit detects the operation data of the motor monomer and sends the signal to the microprocessor for processing, and the microprocessor controls the inverter circuit to drive the communication of the motor winding on the stator assembly It also includes several gear input lines. The gear input lines are connected to the microprocessor through the interface circuit. Each gear input line represents a running speed. Control the motor unit to run at the selected operating speed. The interface circuit includes several signal conversion circuits. Each gear input line is connected to one signal conversion circuit. The microprocessor receives the gear signal of the gear input line through the signal conversion circuit. At least one signal conversion circuit can receive the PWM signal and the AC signal of the gear input line.

The fan motor mentioned above is an electronically commutated motor.

The AC signal output from the above-mentioned thermostat to the PWM controller includes a primary cooling signal, a secondary cooling signal, a primary heating signal and a secondary heating signal.

Compared with the prior art, the present invention has the following effects: 1) the interface circuit includes several signal conversion circuits, each gear input line is connected to one signal conversion circuit, and the microprocessor receives the gear of the gear input line through the signal conversion circuit. Bit signal, at least one signal conversion circuit can receive the PWM signal and AC signal of the gear input line, the structure is simple, easy to modify and debug, and low cost; 2) The temperature controller detects the ambient temperature and outputs the AC signal to the PWM controller, The PWM controller receives and processes the AC signal, and the PWM controller outputs the gear signal to the motor controller. The interface circuit includes several signal conversion circuits, and each gear input line is connected to a signal conversion circuit, and the microprocessor receives the signal through the signal conversion circuit. The gear signal of the gear input line, at least one signal conversion circuit can receive the PWM signal and AC signal of the gear input line, and the PWM controller is used on site to adjust the output torque or speed of each gear motor, and to debug the air volume on site It brings convenience, reduces debugging cost and has high reliability.

Description of drawings:

Fig. 1 is the circuit principle block diagram of existing electronic commutation motor;

Fig. 2 is a block diagram of circuit principle of the present invention;

Fig. 3 is the concrete circuit diagram of interface circuit of the present invention;

Fig. 4 is the block diagram of the circuit principle of the HVAC debugging system of the present invention;

Fig. 5 is a schematic block diagram of the circuit of Embodiment 2 of the present invention.

detailed description:

The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

Embodiment 1: As shown in Figure 2 and Figure 3, the present invention is an electronically commutated motor, including a motor unit and a motor controller, and the described motor unit includes a stator assembly, a rotor assembly and a casing assembly, and the stator The assembly is installed on the casing assembly, and the rotor assembly is set on the inside or outside of the stator assembly. The motor controller includes a power supply unit, a detection circuit, a microprocessor, an inverter unit and an interface circuit. The output end of the power supply unit is the motor The circuit of each part of the controller supplies power, the detection circuit detects the operation data of the motor unit and sends the signal to the microprocessor for processing, and the microprocessor controls the inverter circuit to drive the on-off of the motor winding on the stator assembly, and it also includes several gears The input line, the gear input line is connected with the microprocessor through the interface circuit, each gear input line represents a running speed, and the microprocessor controls the motor unit according to the selected speed according to the power on and off of each gear input line. Running speed operation, the interface circuit includes several signal conversion circuits, each gear input line is connected to one signal conversion circuit, the microprocessor receives the gear signal of the gear input line through the signal conversion circuit, and at least one signal conversion circuit can receive The PWM signal and the AC signal of the gear input line, and the other signal conversion circuits can only receive the AC signal.

The number of signal conversion circuits is at least three.

The signal conversion circuit capable of receiving PWM signals and AC signals includes a first optocoupler U601, a diode D601, a first resistor R601 and an eleventh resistor R611, and the fifth gear input line M5 communicates with the first resistor R601 through the first resistor R601. The first pin of the optocoupler U601 is connected, the second pin of the first optocoupler U601 is grounded, the anode of the diode D601 is connected to the second pin of the first optocoupler U601, and the cathode is connected between the first resistor R601 and the first optocoupler Between the first pins of U601, the fourth pin of the first optocoupler U601 is connected to the power supply, the third pin of the first optocoupler U601 is connected to the microprocessor, and both ends of the eleventh resistor R611 are respectively connected to the first optocoupler Coupling the third pin of U601 and the ground, when the fifth gear input line M5 inputs an AC signal, the signal conversion circuit outputs a half-wave DC signal to the microprocessor, when the fifth gear input line M5 inputs a PWM signal, the signal conversion circuit Output PWM signal to microprocessor. The rest of the signal conversion circuits capable of receiving PWM signals and AC signals are similar in working principle to the signal conversion circuits of the fifth gear input line M5 described above.

The signal conversion circuit that can only receive AC signals includes a third optocoupler U603, a third resistor R603, a thirteenth resistor R613 and a second capacitor C602. The first gear input line M1 connects with the third optocoupler U603 through the third resistor R603 The first pin of the third optocoupler U603 is connected to the ground, the fourth pin of the third optocoupler U603 is connected to the power supply, the third pin of the third optocoupler U603 is connected to the microprocessor, the tenth The two ends of the three resistors R613 are respectively connected to the third pin of the third optocoupler U603 and the ground, and the second capacitor C602 is connected in parallel to the two ends of the thirteenth resistor R613. When the first gear input line M1 inputs an AC signal, the signal conversion circuit Outputs a full-wave DC signal to the microprocessor. The other signal conversion circuits that can only receive AC signals are similar in working principle to the above-mentioned signal conversion circuit of the first gear input line M1.

The principle of the present invention is: the interface circuit includes several signal conversion circuits, each gear input line is connected to one signal conversion circuit, the microprocessor receives the gear signal of the gear input line through the signal conversion circuit, and at least one signal conversion circuit It can receive the PWM signal and the AC signal of the gear input line, the structure is simple, and the modification and debugging of the electronic commutation motor can be facilitated through the PWM signal, and the cost is low.

Embodiment 2: As shown in Fig. 2 and Fig. 3, the present invention is an electronically commutated motor control method, the electronically commutated motor includes a motor unit and a motor controller, and the described motor unit includes a stator assembly , the rotor assembly and the casing assembly, the stator assembly is installed on the casing assembly, the rotor assembly is set on the inside or outside of the stator assembly, and the motor controller includes a power supply unit, a detection circuit, a microprocessor, an inverter unit and an interface circuit, the output end of the power supply unit supplies power to each part of the motor controller, the detection circuit detects the operation data of the motor unit and sends the signal to the microprocessor for processing, and the microprocessor controls the inverter circuit to drive the motor winding on the stator assembly On-off, it also includes a number of gear input lines, the gear input lines are connected to the microprocessor through the interface circuit, each gear input line represents a running speed, and the microprocessor according to the on-off of each gear input line The electric control motor runs at the selected operating speed. The interface circuit includes several signal conversion circuits. Each gear input line is connected to a signal conversion circuit. The microprocessor receives the gear signal of the gear input line through the signal conversion circuit. , at least one signal conversion circuit can receive the PWM signal and AC signal of the gear input line, and the rest of the signal conversion circuits can only receive AC signals. When the microprocessor receives each signal conversion circuit, when the signal conversion circuit simultaneously inputs PWM signal and AC signal, the microprocessor processes the PWM signal first.

The number of signal conversion circuits is 5, and each signal conversion circuit can respectively receive the first PWM signal PWM1 and the first AC signal TAP1, the second PWM signal PWM2 and the second AC signal TAP2, the third PWM signal PWM3 and the third AC signal Signal TAP3, the fourth PWM signal PWM4 and the fourth AC signal TAP4, the fifth PWM signal PWM5 and the fifth AC signal TAP5, the priority order of each signal by the microprocessor is: PWM1>PWM2>PWM3>PWM4>PWM5>TAP1 > TAP2 > TAP3 > TAP4 > TAP5.

The principle of the present invention is: the interface circuit includes several signal conversion circuits, each gear input line is connected to one signal conversion circuit, the microprocessor receives the gear signal of the gear input line through the signal conversion circuit, and at least one signal conversion circuit It can receive the PWM signal and AC signal of the gear input line. When the microprocessor receives the signal conversion circuits of various channels, when the signal conversion circuit inputs the PWM signal and the AC signal at the same time, the microprocessor processes the PWM signal first. The structure is simple. Through the PWM signal, the torque or speed output by the motor in each gear can be conveniently adjusted on site, which is easy to operate and reduces costs.

Embodiment three: as shown in Fig. 2, Fig. 3 and Fig. 4, the present invention is a kind of HVAC debugging system, comprises air-conditioning controller, thermostat, PWM controller and fan motor, and thermostat sends ambient temperature signal to The air conditioner controller, the air conditioner controller and the motor controller are connected and communicate with each other, the thermostat detects the ambient temperature and outputs an AC signal to the PWM controller, the PWM controller receives and processes the AC signal, and the PWM controller outputs a gear signal to the motor controller , the fan motor includes a motor unit and a motor controller, the motor unit includes a stator assembly, a rotor assembly and a casing assembly, the stator assembly is installed on the casing assembly, the rotor assembly is sleeved on the inside or outside of the stator assembly, and the motor The controller includes a power supply unit, a detection circuit, a microprocessor, an inverter unit and an interface circuit. The output end of the power supply unit supplies power to each part of the motor controller. The detection circuit detects the operation data of the motor unit and sends the signal to the microcomputer. Processor processing, the microprocessor controls the inverter circuit to drive the on-off of the motor winding on the stator assembly, it also includes a number of gear input lines, the gear input lines are connected to the microprocessor through the interface circuit, and each gear input line represents A running speed, the microprocessor controls the motor unit to run at the selected running speed according to the power on and off of each gear input line, the interface circuit includes several signal conversion circuits, and each gear input line is connected to a signal conversion circuit circuit, the microprocessor receives the gear signal of the gear input line through the signal conversion circuit, and at least one signal conversion circuit can receive the PWM signal and the AC signal of the gear input line.

When only one signal conversion circuit can receive the PWM signal and the AC signal, the torque or rotational speed output by the motors in different gears can be adjusted through the PWM signal only through one signal conversion circuit.

The fan motor is an electronically commutated motor.

The AC signals output by the thermostat to the PWM controller include a primary cooling signal Y1, a secondary cooling signal Y2, a primary heating signal W1, and a secondary heating signal W2.

The principle of the present invention is: at least one signal conversion circuit can receive the PWM signal and the AC signal of the gear input line, and the PWM controller is used on site to adjust the torque or rotational speed output by each gear motor, which brings a lot of air volume to the on-site debugging. Convenience, reduced debugging cost, high reliability.

Embodiment 4: As shown in Figure 5, the present invention is an electronically commutated motor, including a motor unit and a motor controller. The motor unit includes a stator assembly, a rotor assembly and a casing assembly, and the stator assembly is installed on On the casing assembly, the rotor assembly is set on the inside or outside of the stator assembly. The motor controller includes a power supply unit, a detection circuit, a microprocessor, an inverter unit and an interface circuit. The output terminals of the power supply unit are each Part of the circuit supplies power, and the detection circuit detects the operating data of the motor unit and sends the signal to the microprocessor for processing. The microprocessor controls the inverter circuit to drive the on-off of the motor winding on the stator assembly. It also includes several gear input lines, The gear input line is connected to the microprocessor through the interface circuit, each gear input line represents a running speed, and the microprocessor controls the motor unit to run at the selected running speed according to the power on and off of each gear input line , the interface circuit includes several signal conversion circuits, each gear input line is connected to one signal conversion circuit, the microprocessor receives the gear signal of the gear input line through the signal conversion circuit, and at least one signal conversion circuit can receive the gear input The PWM signal and the AC signal of the line, and the rest of the signal conversion circuits can only receive the AC signal.

The number of signal conversion circuits is three.

The principle of the present invention is: the interface circuit includes several signal conversion circuits, each gear input line is connected to one signal conversion circuit, the microprocessor receives the gear signal of the gear input line through the signal conversion circuit, and at least one signal conversion circuit It can receive the PWM signal and the AC signal of the gear input line, the structure is simple, and the modification and debugging of the electronic commutation motor can be facilitated through the PWM signal, and the cost is low.

Claims (1)

1. a kind of control method of electronics commutated motor, described electronics commutated motor includes motor monomer and electric machine controller, Described motor monomer includes stator module, rotor assembly and case component, and stator module is arranged on case component, rotor set Part is sleeved on the inner side or outside of stator module, and described electric machine controller includes power subsystem, detection circuit, microprocessor Device, inversion unit and interface circuit, the output end of power subsystem are powered for electric machine controller each several part circuit, detect electric circuit inspection The signal is simultaneously sent to microprocessor processes by the service data of motor monomer, and microprocessor control inverter circuit drives stator module The break-make of upper machine winding, it also includes some gear input lines, and gear input line is connected by interface circuit with microprocessor, Every gear input line represents a kind of speed of service, and microprocessor is according to every control system of switching on or off electricity motor monomer of gear input line Run by the selected speed of service, if interface circuit includes main line signaling conversion circuit, every gear input line connection is believed all the way Number change-over circuit, microprocessor passes through the gear signal that signaling conversion circuit receives gear input line, and signal at least all the way turns Changing circuit can receive the pwm signal and AC signal of gear input line, and remaining signaling conversion circuit can only receive AC signal, its It is characterised by：Microprocessor has pwm signal and friendship when each road signaling conversion circuit is received when signaling conversion circuit is input into simultaneously Stream signal, microprocessor priority treatment pwm signal, the quantity of signaling conversion circuit is 5, and each signaling conversion circuit can be respectively Receive the first pwm signal PWM1 and the first AC signal TAP1, the second pwm signal PWM2 and the second AC signal TAP2, the 3rd Pwm signal PWM3 and the 3rd AC signal TAP3, the 4th pwm signal PWM4 and the 4th AC signal TAP4, the 5th pwm signal PWM5 and the 5th AC signal TAP5, the prioritization of each signal is by microprocessor：PWM1 ＞ PWM2 ＞ PWM3 ＞ PWM4 ＞ PWM5 ＞ TAP1 ＞ TAP2 ＞ TAP3 ＞ TAP4 ＞ TAP5, PWM controller exports gear signal to electric machine controller, leads to Crossing pwm signal live can conveniently adjust the torque or rotating speed of the output of each gear motor.