WO2015154696A1 - Système de moteur à courant continu sans balai pour pompe de vidange, et son procédé de commande et son dispositif de commande - Google Patents

Système de moteur à courant continu sans balai pour pompe de vidange, et son procédé de commande et son dispositif de commande Download PDF

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Publication number
WO2015154696A1
WO2015154696A1 PCT/CN2015/076206 CN2015076206W WO2015154696A1 WO 2015154696 A1 WO2015154696 A1 WO 2015154696A1 CN 2015076206 W CN2015076206 W CN 2015076206W WO 2015154696 A1 WO2015154696 A1 WO 2015154696A1
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rotational speed
duty ratio
brushless motor
brushless
motor
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PCT/CN2015/076206
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English (en)
Chinese (zh)
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王胜
朋兴谱
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常州雷利电机科技有限公司
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Publication of WO2015154696A1 publication Critical patent/WO2015154696A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices

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  • the present invention relates to the field of drainage pump technology, and more particularly to a control method and control device for a DC brushless motor for a drainage pump of a household appliance, and a DC brushless motor system for a drainage pump of a household appliance.
  • single-phase AC permanent magnet synchronous motors are widely used in household appliances such as dishwashers and washing machines for their high energy efficiency and excellent steady-state characteristics.
  • single-phase AC permanent magnet synchronous motors have certain limitations in terms of startup and operation performance.
  • a starting device which is mainly composed of a coupling provided with a starting rib and a starting cavity provided with a starting boss.
  • a starting rib turns to contact with the starting boss, the impeller can be driven to rotate, thereby achieving the effect of no-load starting, effectively solving the problem of burning the motor due to the large starting load.
  • a shock pad may be provided on both sides of the starting rib or on both sides of the starting boss in order to reduce the noise when the starting rib is in contact with the starting boss.
  • the structure of the motor is relatively complicated, the assembly process is cumbersome, and the increase of the starting cavity and the cushion also greatly increases the cost, and the failure of the cushion is present after multiple starts.
  • the single-phase AC permanent magnet synchronous motor itself cannot achieve directional rotation and speed regulation. It is necessary to add a non-return mechanism to the rotor structure to prevent the motor from rotating in reverse, and realize the single-phase AC permanent magnet synchronous motor by adjusting the frequency of the power supply voltage.
  • the speed regulation is that the vibration, the noise is high and the temperature rise is high during the no-load operation, and in the later stage of the drainage process, a small amount of residual water is mixed with the air, so that the drainage pump is in a semi-aqueous and semi-air state, and the motor cannot recognize this. In the state, the impeller still rotates at high speed, producing half-water and half-air noise.
  • a technique for identifying such a semi-aqueous half-air state of a single-phase AC permanent magnet synchronous motor has been proposed.
  • a method for controlling a household appliance discharge pump and a processing unit implementing the same are disclosed in the patent document of Chinese Patent Application Publication No. CN102444570A, which calculates a zero current platform of a motor phase current function and a counter electromotive force associated with the same phase.
  • the phase difference between the zero crossings of the signal identifies the semi-aqueous, semi-air state of the single-phase AC permanent magnet synchronous motor.
  • it only identifies the critical state of the single-phase AC permanent magnet synchronous motor entering the semi-water and semi-air operation, and cuts off the power supply to the motor. After the water level returns to a certain value, start the motor again.
  • the disadvantage of this control method is that the residual water cannot be completely discharged through the motor, so the problem of half-water and half-air noise during the drainage process is not completely solved.
  • a control method and a control device for a DC brushless motor for a drain pump, and a DC brushless motor system for a drain pump are provided, which can identify a half of a drain pump The water is in a semi-air state, and the half-water half-air noise is reduced by lowering the target rotational speed of the brushless DC motor in this state.
  • a control method of a DC brushless motor for a drain pump comprising: after the rotational speed of the DC brushless motor reaches a first predetermined rotational speed, the DC brushless motor is to be Comparing a duty cycle of a voltage pulse supplied by the stator winding with a first critical duty ratio; and determining that the drain pump enters if a duty cycle of the voltage pulse is lower than the first critical duty ratio a semi-aqueous half-air operating state, and setting a target rotational speed of the brushless DC motor to a second predetermined rotational speed, wherein the second predetermined rotational speed is lower than the first predetermined rotational speed.
  • a duty ratio of a voltage pulse for supplying power to a stator winding of the brushless DC motor is a first duty ratio
  • the duty ratio of the voltage pulse for supplying power to the stator winding of the brushless DC motor is the second duty ratio; wherein the first critical duty ratio is greater than the first a duty cycle and less than the second duty cycle.
  • the drain pump when the duty ratio of the voltage pulse continues to decrease and is lower than the first critical duty ratio, it is determined that the drain pump enters a semi-aqueous half-air operating state, and the The target rotational speed of the brushless DC motor is set to a second predetermined rotational speed.
  • the speed of the DC brushless motor in the rated load operating state reaches the first predetermined speed
  • when the duty ratio of the voltage pulse is lower than the first critical duty ratio And determining that the drain pump enters a semi-aqueous half-air operating state, and setting a target rotational speed of the DC brushless motor to the second predetermined rotational speed.
  • the target rotational speed of the drain pump DC brushless motor is set to the third predetermined rotational speed when the duty ratio continues to decrease to the second critical duty ratio, wherein the second critical duty ratio is greater than The first duty cycle is less than the first threshold duty, and the third predetermined speed is higher than the second predetermined speed.
  • the first predetermined rotational speed is equal to or lower than a rated rotational speed of the DC brushless motor
  • the third predetermined rotational speed is equal to a rated rotational speed of the DC brushless motor
  • the first critical duty The ratio is equal to the second critical duty cycle.
  • a control device for a DC brushless motor for a drain pump comprising: a duty ratio comparing member that will give a speed after the speed of the DC brushless motor reaches a first predetermined speed Comparing a duty ratio of a voltage pulse supplied from a stator winding of the brushless DC motor with a first critical duty ratio, and obtaining a first comparison result; and a target rotation speed setting unit indicating the first comparison result
  • the duty ratio of the voltage pulse is lower than the first critical duty ratio
  • the target rotating speed of the DC brushless motor is set to a second predetermined The rotational speed, wherein the second predetermined rotational speed is lower than the first predetermined rotational speed.
  • a duty ratio of a voltage pulse for supplying power to a stator winding of the brushless DC motor is a first duty ratio
  • the duty ratio of the voltage pulse for supplying power to the stator winding of the brushless DC motor is the second duty ratio; wherein the first critical duty ratio is greater than the first a duty cycle and less than the second duty cycle.
  • the target rotational speed setting unit indicates that the duty ratio of the voltage pulse is lower than the first comparison result.
  • the first critical duty ratio it is judged that the drain pump enters a half-water half-air operating state, and the target rotational speed of the direct current brushless motor is set to the second predetermined rotational speed.
  • the duty ratio comparing unit compares a duty ratio of a voltage pulse for supplying power to a stator winding of the brushless DC motor with a second threshold duty ratio, and obtains a second comparison result;
  • the target rotational speed setting unit further sets a target rotational speed of the DC brushless motor to the first in a case where the second comparison result indicates that a duty ratio of the voltage pulse is lower than a second critical duty ratio a predetermined rotational speed, wherein the second critical duty ratio is greater than the first duty cycle and less than the first critical duty cycle, the third predetermined rotational speed being higher than the second predetermined rotational speed speed.
  • the first predetermined rotational speed is equal to or lower than a rated rotational speed of the DC brushless motor
  • the third predetermined rotational speed is equal to a rated rotational speed of the DC brushless motor
  • the first critical duty The ratio is equal to the second critical duty cycle.
  • a DC brushless motor system for a drain pump comprising: a DC brushless motor comprising: a stator assembly and a rotor assembly, the stator assembly including a stator core and being wound in a stator core slot a stator winding, the rotor assembly includes a rotor pole; and a motor control system comprising: a drive module, a position detection module, and a control module, wherein the position detection module detects a position of a rotor pole in the DC brushless motor, The control module calculates an actual rotational speed of the rotor magnetic pole according to the position of the rotor magnetic pole detected by the position detecting module, and outputs the control according to the target rotational speed of the DC brushless motor and the actual rotational speed of the DC brushless motor.
  • control module further determines that the drain pump enters a semi-aqueous half-air state when a duty ratio of a voltage pulse output by the driving module is lower than a first critical duty ratio And reducing the target rotational speed of the brushless DC motor.
  • the number of stator core slots is the same as the number of rotor poles, and the radial air gap formed by the rotor poles and the stator core is a non-uniform air gap.
  • the driving module comprises an H-bridge inverter; and the control pulse signal output by the control module is a switch control pulse signal for controlling four switches in the H-bridge inverter.
  • the control module determines when the duty ratio of the voltage pulse outputted by the driving module is lower than the first critical duty ratio.
  • the drain pump enters a semi-aqueous half-air state, and sets a target rotational speed of the direct current brushless motor to a second predetermined rotational speed, wherein the second predetermined rotational speed is lower than the first predetermined rotational speed.
  • a duty ratio of a voltage pulse outputted by the driving module is a first duty ratio; and the DC brushless motor is at a rated load
  • a duty ratio of a voltage pulse output by the driving module is a second duty ratio; wherein the first critical duty ratio is greater than the first duty ratio, and is smaller than the second duty ratio Empty ratio.
  • the control module determines that the drain pump enters the semi-aqueous half air operating state, and sets the target rotational speed of the DC brushless motor to the second predetermined rotational speed.
  • the target rotational speed setting of the drain brush DC brushless motor is set. Is the third predetermined rotational speed, wherein the second critical duty ratio is greater than the first duty cycle and less than the second duty cycle, the third predetermined rotational speed being higher than the second predetermined Rotating speed.
  • the first predetermined rotational speed and the third predetermined rotational speed are equal to a rated rotational speed of the DC brushless motor; the first critical duty ratio is equal to the second critical duty ratio.
  • a control method and a control device for a DC brushless motor for a drain pump according to an embodiment of the present invention, and a DC brushless motor system for a drain pump, after the rotational speed of the DC brushless motor reaches a preset rotational speed,
  • the duty ratio of the voltage pulse supplied by the stator winding of the DC brushless motor is compared with a preset critical duty ratio corresponding to the semi-aqueous half air state critical judgment point of the drain pump, and it is determined whether the drain pump enters a half a water semi-air state, and further reducing a target rotational speed of the DC brushless motor in a state where the drain pump is judged to enter a semi-aqueous half-air state, thereby reducing a half-water half-air noise generated by the drain pump, and simultaneously It also enables the drain pump to completely drain the remaining water.
  • FIG. 1 is a schematic view showing the overall structure of a DC brushless motor system for a drain pump according to an embodiment of the present invention
  • FIG. 2 illustrates a schematic block diagram of a motor control system in a drain pump in accordance with an embodiment of the present invention
  • FIG. 3 is a block diagram showing a specific structure of a motor control system according to an embodiment of the present invention.
  • control module 22 illustrates a control schematic diagram implemented by control module 22 in accordance with an embodiment of the present invention
  • FIG. 5 illustrates an operation stage of a DC brushless motor for a drain pump according to an embodiment of the present invention. intention
  • FIG. 6 illustrates a schematic flow chart of a method 600 of controlling a brushless DC motor in accordance with an embodiment of the present invention
  • FIG. 7 illustrates a schematic block diagram of a control device 700 of a DC brushless motor for a drain pump according to an embodiment of the present invention.
  • the brushless DC motor has the advantage that the single-phase AC permanent magnet synchronous motor can not be compared in terms of starting. It can provide a large starting torque in addition to the starting device. Therefore, in the present invention, a DC brushless motor is applied to the field of household appliance drainage pumps such as dishwashers and washing machines.
  • FIG. 1 is a schematic view showing the overall structure of a DC brushless motor system for a drain pump according to an embodiment of the present invention.
  • the DC brushless motor system for a drain pump shown in FIG. 1 includes a DC brushless motor 1 and a motor control system 2.
  • the brushless DC motor 1 includes a stator assembly including a stator core and stator windings wound in a stator core slot, and a rotor assembly including a rotor pole.
  • the stator winding is a single-phase bipolar winding wound in a stator core slot according to a certain regularity.
  • the radial air gap formed by the rotor pole and the stator core is a non-uniform air gap, a position where the air gap is large, a large magnetic resistance, a small air gap, and a small magnetic resistance.
  • FIG. 2 shows a detailed schematic of a motor control system 2 in accordance with an embodiment of the present invention.
  • the motor control system 2 includes a drive module 21, a control module 22, and a position detection module 23 in accordance with an embodiment of the present invention.
  • the driving module 21 supplies power to the DC brushless motor, and the driving module 21 has two output terminals A and B.
  • the output polarity is adjustable between the first output end A and the second output end B, and the width can be And a voltage pulse having a constant amplitude, the voltage pulse driving the DC brushless motor to rotate.
  • FIG. 3 shows a block diagram of a specific structure of a motor control system according to an embodiment of the present invention.
  • the driving module 21 may include an H-bridge inverter circuit, and the driving module 21 receives a four-way switch control signal from the control module 22, and the switch control signal may be a PWM signal, and according to The received four-way switch control signals respectively control the conduction and disconnection of the switches of the four bridge arms of the H-bridge inverter circuit.
  • the generation of the PWM signal is not specifically described herein.
  • each of the bridge arms of the H-bridge inverter circuit includes a controllable switch
  • the controllable switch is, for example, a switching device such as a MOSFET or an IGBT.
  • the H-bridge inverter circuit includes switches Q1, Q2, Q3, and Q4, wherein switches Q1 and Q3 are located in the upper arm, switches Q2 and Q4 are located in the lower arm, and switches Q1 and Q3 are The connection point between the two constitutes the first input terminal M, the connection point between the switch Q2 and the switch Q4 constitutes the second input terminal N, the connection point of the switch Q1 and the switch Q2 constitutes the first output terminal A, and the connection of the switch Q3 and the switch Q4 The dots constitute a second output terminal B.
  • the polarity and width of the voltage pulse applied between the first output terminal A and the second output terminal B can be controlled by controlling the on and off of the switches Q1, Q2, Q3 and Q4.
  • the drive module 21 may further include a level conversion circuit (not shown) that receives the four-way switch control signal from the control module 22 and receives the received four, as needed.
  • the switch control signals are level-converted to obtain four-way switch drive signals for driving the switches Q1, Q2, Q3 and Q4 in the H-bridge inverter circuit, respectively.
  • the high level of the four-way switch control signal may be 5V
  • the high level of the four-way switch drive signal may be 12V.
  • the position detecting module 23 may include a Hall sensor mounted on the stator core at a position close to the rotor through which the position of the rotor pole is sensed.
  • the rotor pole position signal obtained by the Hall sensor is in the form of high and low levels.
  • the control module 22 can receive the rotor magnetic pole position signal output by the position detecting module 23, and can calculate the rotor magnetic pole of the DC brushless motor according to the position of the rotor magnetic pole detected by the position detecting module 23.
  • the actual rotational speed, and a control pulse signal for controlling the drive module, that is, the four-way switch control signal, is output according to a target rotational speed of the DC brushless motor and an actual rotational speed of the DC brushless motor.
  • control module 22 shows a control schematic diagram implemented by control module 22 in accordance with an embodiment of the present invention.
  • control module 22 can include a speed outer loop control sub-module 221 and a current inner loop control sub-module 222.
  • the speed outer loop control sub-module 221 implements a closed loop control function of the speed outer loop, which calculates a speed difference between the current speed of the DC brushless motor and the target speed, and obtains a current inner loop based on the speed difference Current setpoint.
  • the speed outer loop control sub-module 221 may include a speed PID controller, and the speed PID controller performs a PID (proportional-integral-derivative) operation on the speed difference to obtain the current. Desired point.
  • the control performance of the DC brushless motor control system can be adjusted by adjusting the proportional coefficient, the integral coefficient, and the differential coefficient of the speed PID controller.
  • the current inner loop control sub-module 222 implements a closed loop control function of the current inner loop, which calculates a current between the current stator current of the brushless DC motor and the current set value provided by the speed outer loop control sub-module 221 And a duty ratio, and based on the current difference, controlling a duty cycle of a voltage pulse that the driving module supplies power to a stator winding of the brushless DC motor.
  • the current loop control sub-module 222 may include a current PID controller, and the current PID controller performs a PID (proportional-integral-derivative) operation on the speed difference to obtain the current Value.
  • the control performance of the DC brushless motor control system can be adjusted by adjusting the proportional coefficient, the integral coefficient, and the differential coefficient of the current PID controller.
  • the motor control system may further include a current detector that detects a stator current of the DC brushless motor, and an AD converter that detects the current The analog signal of the stator current of the DC brushless motor detected by the device is converted into a digital signal.
  • the target rotational speed of the DC brushless motor is its rated rotational speed.
  • the driving module is given to the DC brushless motor.
  • the duty ratio of the voltage pulse supplied by the stator winding is the first duty ratio; and when the DC brushless motor is in the rated load operating state, the target of the DC brushless motor is turned The speed is also its rated speed.
  • the duty ratio of the voltage pulse supplied by the driving module to the stator winding of the brushless DC motor is the second duty ratio. According to the operating principle of the DC brushless motor, the second duty ratio is greater than the first duty ratio.
  • the speed closed-loop control sub-module 221 will control the DC brushless motor to maintain its rotational speed constant, through the control of the speed closed-loop control sub-module 221 and the current closed-loop control sub-module 222, by adjusting the drive module a duty cycle of a voltage pulse for supplying power to a stator winding of the brushless DC motor to maintain a constant rotational speed of a rotor pole of the DC brushless motor, and at this time, a duty ratio of the voltage pulse is a third duty ratio .
  • the second duty ratio is greater than the third duty ratio
  • the third duty ratio is greater than the first duty ratio.
  • the DC brushless motor for the drain pump enters the semi-aqueous half-air operating state, the DC brushless motor still drives the impeller to rotate at a high speed, resulting in a large half-half air noise.
  • the half-water and half-air operating state of the DC brushless motor is identified according to the duty ratio of the voltage pulse supplied by the driving module to the stator winding of the brushless DC motor, and is recognized Reducing the target rotational speed of the DC brushless motor after the semi-aqueous and semi-air operating state, that is, reducing the target rotational speed of the DC brushless motor in the semi-aqueous and semi-air operating state, thereby reducing the half-water and half-air noise. And the DC brushless motor continues to operate at a reduced rotational speed to drive the impeller portion to discharge all of the remaining water.
  • Fig. 5 is a view showing the working phase of a DC brushless motor for a drain pump according to an embodiment of the present invention.
  • the switches Q1 and Q4 in the H-bridge inverter circuit are turned on, and are output between the first output terminal A and the second output terminal B of the H-bridge inverter circuit.
  • the polarity of the voltage pulse is positive polarity.
  • the stator winding of the brushless DC motor is pre-energized in the A ⁇ B direction, and then the switches Q2 and Q3 in the H-bridge inverter circuit are turned on.
  • the polarity is negative polarity, in other words, the stator winding of the brushless DC motor is pre-energized in the B ⁇ A direction.
  • the magnetic field formed by pre-energizing the stator winding of the brushless DC motor can form a magnetic field with the magnetic pole of the rotor Repulsive force or suction, thereby driving the rotor pole to rotate a slight angle, and enabling the position sensing module to determine the position of the rotor pole at this time.
  • the speed outer loop control sub-module 221 and the current inner loop control sub-module 222 in the control module 21 control the control
  • the DC brushless motor is accelerated until the target speed (eg, rated speed) is reached.
  • the DC brushless motor enters the stable operation phase S2 under the control of the control module 21.
  • the load of the brushless DC motor is reduced, and correspondingly through the speed outer loop control sub-module 221 and the control unit 22 in the control module 22
  • the control of the current inner loop control sub-module 222 adjusts the duty cycle of the voltage pulse supplied by the drive module to the stator winding of the brushless DC motor, thereby maintaining the rotational speed of the brushless DC motor substantially constant. Specifically, the duty cycle of the voltage pulse that the drive module supplies power to the stator windings of the brushless DC motor is reduced.
  • the drain pump As the displacement of the drain pump increases, more and more air enters, at which point the drain pump enters the semi-aqueous half-air operating phase S3. In this stage, especially in the later stage of the drainage process, a small amount of water remains mixed with the air. If the brushless DC motor still rotates the impeller portion at a high speed, the drain pump will generate a larger half-water half. Air noise.
  • the control method of the DC brushless motor according to the embodiment of the present invention will mainly be directed to the identification of the semi-aqueous half-air stage and the subsequent processing, and the control method of the DC brushless motor according to the embodiment of the present invention will be specifically described below with reference to FIG. .
  • FIG. 6 illustrates a schematic flow diagram of a method 600 of controlling a brushless DC motor in accordance with an embodiment of the present invention.
  • step S610 the actual rotational speed of the brushless DC motor is compared with a preset first predetermined rotational speed.
  • step S620 it is determined whether the actual rotational speed of the DC brushless motor is greater than the first predetermined rotational speed.
  • Step S630 the control method of the DC brushless motor according to the embodiment of the present invention proceeds to Step S630.
  • step S630 the duty cycle of the voltage pulse that supplies power to the stator windings of the brushless DC motor is compared to the first threshold duty cycle.
  • step S640 it is determined whether the duty ratio of the voltage pulse is lower than the first critical duty ratio.
  • step S650 the control method of the DC brushless motor according to the embodiment of the present invention proceeds to step S650.
  • step S650 it is determined that the drain pump enters a semi-aqueous half-air operating state, and the target rotational speed of the direct current brushless motor is set to a second predetermined rotational speed, and the second predetermined rotational speed is lower than the first predetermined rotational speed.
  • the comparison of the duty ratios of the voltage pulses is performed after the rotation speed of the DC brushless motor reaches a preset first predetermined rotation speed.
  • the preset first predetermined rotational speed may be a target rotational speed of the DC brushless motor operation and may be the rated rotational speed, or may be a rotational speed lower than the target rotational speed, for example, the target rotational speed or the rated rotational speed. 90%.
  • the control module 22 can determine that the DC brushless motor enters a semi-aqueous half-air state, and at this time, the target rotating speed of the drain brush DC brushless motor can be reduced, thereby reducing the half-water and half-air noise of the drain pump.
  • the first critical duty ratio here is only a set value, in fact, as long as the drain pump starts to drain, the DC brushless motor enters a water and air mixed state, but at this time the proportion of air is small and the said The noise generated by the drain pump is within the allowable range.
  • the predetermined first critical duty ratio may be selected according to the noise generated by the drain pump, or may be The proportion of air is chosen.
  • the duty ratio of the voltage pulse for supplying power to the stator winding of the brushless DC motor is the first duty ratio;
  • the duty ratio of the voltage pulse for supplying power to the stator winding of the brushless DC motor is the second duty ratio, and the second duty ratio is greater than the first duty ratio .
  • the first threshold duty ratio may be selected as a value between the first duty ratio and the second duty ratio, for example, 70% of the second duty ratio, ie, The first critical duty ratio is greater than the first duty cycle and less than the second duty cycle.
  • the DC When the duty ratio of the voltage pulse for supplying power to the stator winding of the brushless motor of the DC brushless motor is between the first threshold duty ratio and the second duty ratio, the DC is still considered The brushless motor does not enter the semi-aqueous half air state, and the target rotational speed of the DC brushless motor remains unchanged.
  • the drain pump DC brushless motor Determining that the drain pump DC brushless motor enters a half when the duty ratio of the voltage pulse supplied by the driving module to the stator winding of the brushless DC motor is reduced to be equal to or lower than the first threshold duty ratio a water semi-air state, and at this time, lowering a target rotational speed of the drain pump DC brushless motor, for example, setting a target rotational speed at this time to the second predetermined rotational speed, the second predetermined rotational speed being, for example, the 40% to 60% of the rated speed.
  • the semi-aqueous half-air noise generated by the drain pump in the semi-aqueous half-air state in the late stage of drainage can be reduced, and The remaining water can still be completely drained.
  • the control module 22 determines that the drain pump enters the semi-aqueous half-air operating state, and sets the target rotational speed of the DC brushless motor to the second predetermined rotational speed.
  • a critical duty ratio not only a critical duty ratio but also two critical duty ratios may be set, for example, the first duty ratio ⁇ the lower critical duty ratio ⁇ the upper critical duty ratio ⁇ the second occupied a ratio of a target speed of the brushless DC motor to a first intermediate speed when the duty ratio of the voltage pulse decreases to be equal to or lower than the upper threshold duty ratio, and the voltage pulse is
  • the duty ratio is reduced to be equal to or lower than the lower critical duty ratio
  • the target rotational speed of the brushless DC motor is reduced to a second intermediate rotational speed
  • the first intermediate rotational speed is greater than the second intermediate rotational speed.
  • a predetermined second critical duty ratio may be set, and the second critical duty ratio is lower than the first critical duty ratio, And the first critical duty ratio and the second critical duty ratio constitute a duty cycle interval of the semi-aqueous half air operating state.
  • control method 600 of the brushless DC motor according to the embodiment of the present invention may further include step S660 (not shown) after step S650.
  • step S660 comparing the duty ratio of the voltage pulse supplied by the driving module to the stator winding of the brushless DC motor to the second threshold duty ratio, the duty ratio of the voltage pulse is lower than
  • the control unit 22 sets the target rotational speed of the brushless DC motor to a third predetermined rotational speed, wherein the second critical duty ratio is greater than the first duty cycle And smaller than the first critical duty ratio, the third predetermined rotational speed being higher than the second predetermined rotational speed.
  • the first predetermined rotational speed may be equal to or lower than a rated rotational speed of the brushless DC motor
  • the third predetermined rotational speed may be equal to a rated rotational speed of the DC brushless motor
  • Fig. 7 shows a schematic block diagram of a control device 700 for a DC brushless motor for a drain pump according to an embodiment of the present invention.
  • control device 700 for a DC brushless motor for a drain pump may include a duty ratio comparison unit 710 and a target rotation speed setting unit 720.
  • the duty ratio comparing unit 710 compares the duty ratio of the voltage pulse for supplying the stator winding of the brushless DC motor with the first critical duty ratio after the speed of the brushless DC motor reaches the first predetermined speed. And get the first comparison result.
  • the target rotation speed setting unit 720 determines that the drain pump enters the semi-aqueous half air operation state in a case where the first comparison result indicates that the duty ratio of the voltage pulse is lower than the first critical duty ratio, and The target rotational speed of the brushless DC motor is set to a second predetermined rotational speed, wherein the second predetermined rotational speed is lower than the first predetermined rotational speed.
  • a duty ratio of a voltage pulse for supplying power to a stator winding of the brushless DC motor is a first duty ratio
  • the duty ratio of the voltage pulse for supplying power to the stator winding of the brushless DC motor is the second duty ratio; wherein the first critical duty The ratio is greater than the first duty cycle and less than the second duty cycle.
  • the target rotational speed setting unit 720 indicates that the duty ratio of the voltage pulse is low at the first comparison result.
  • the first critical duty ratio it is determined that the drain pump enters a half-water half-air operating state, and the target rotating speed of the DC brushless motor is set to the second predetermined rotational speed.
  • the duty ratio comparison section 710 compares the duty ratio of the voltage pulse supplied to the stator winding of the brushless DC motor with the second critical duty ratio, and obtains a second comparison result.
  • the target rotational speed setting unit 720 further targets the DC brushless motor if the second comparison result indicates that the duty ratio of the voltage pulse is lower than the second critical duty ratio.
  • the rotation speed is set to the third predetermined rotation speed, wherein the second critical duty ratio is greater than the first duty ratio and is less than the first critical duty ratio, the third predetermined rotation speed being higher than the The second predetermined rotational speed, and the first critical duty ratio and the second critical duty ratio constitute a duty cycle interval of the semi-aqueous half air operating state.
  • the first predetermined rotational speed may be equal to or lower than a rated rotational speed of the brushless DC motor
  • the third predetermined rotational speed may be equal to a rated rotational speed of the DC brushless motor
  • a control method and a control device for a DC brushless motor for a drain pump and a DC brushless motor system for a drain pump according to an embodiment of the present invention, which pass the speed of the DC brushless motor, have been described with reference to FIGS.
  • the duty ratio of the voltage pulse for supplying power to the stator winding of the brushless DC motor is compared with a preset critical duty ratio corresponding to the semi-aqueous half air state critical judgment point of the drain pump Determining whether the drain pump enters a semi-aqueous half-air state, and further reducing a target rotational speed of the DC brushless motor in a case where the drain pump is judged to enter a semi-aqueous half-air state, thereby reducing the generation of the drain pump
  • the semi-aqueous half-air noise also enables the drain pump to completely drain the remaining water.

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  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne un procédé de commande et un dispositif de commande d'un moteur à courant continu sans balai pour une pompe de vidange, et un système de moteur à courant continu sans balai pour la pompe de vidange, le procédé de commande consistant à : lorsque la vitesse de rotation d'un moteur à courant continu sans balai atteint une première vitesse de rotation prédéterminée, comparer le rapport cyclique d'une impulsion de tension alimentant l'enroulement de stator du moteur à courant continu sans balai à un premier rapport cyclique critique ; et quand le rapport cyclique de l'impulsion de tension est inférieur au premier rapport cyclique critique, déterminer que la pompe de vidange est dans un état de fonctionnement mi-eau mi-air, et régler la vitesse de rotation cible du moteur à courant continu sans balai à une seconde vitesse de rotation prédéterminée, la seconde vitesse de rotation prédéterminée étant inférieure à la première vitesse de rotation prédéterminée. L'état mi-eau mi-air de la pompe de vidange est identifié en fonction du rapport cyclique de l'impulsion de tension alimentant l'enroulement de stator, et un bruit de fonctionnement mi-eau mi-air est réduit par réduction de la vitesse de rotation cible du moteur à courant continu sans balai dans l'état mi-eau mi-air.
PCT/CN2015/076206 2014-04-11 2015-04-09 Système de moteur à courant continu sans balai pour pompe de vidange, et son procédé de commande et son dispositif de commande WO2015154696A1 (fr)

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CN201410147211.8A CN104980066B (zh) 2014-04-11 2014-04-11 排水泵用直流无刷电动机系统、及其控制方法和控制装置
CN201410147211.8 2014-04-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3567718A3 (fr) * 2018-05-10 2020-03-04 Guangdong Boyu Group Co., Ltd Circuit de commande et procédé appliqué à un dispositif de pompage, dispositif de pompage et équipement d'aquarium

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106385208A (zh) 2016-11-29 2017-02-08 深圳市道通智能航空技术有限公司 一种永磁同步电机启动方法、装置和无人飞行器
CN107911052A (zh) * 2017-11-28 2018-04-13 佛山市顺德区美的洗涤电器制造有限公司 洗碗机及其控制电路
WO2019119234A1 (fr) * 2017-12-18 2019-06-27 深圳市大疆创新科技有限公司 Procédé et dispositif de détection, véhicule aérien sans pilote et support d'informations lisible
CN111603056B (zh) * 2019-02-22 2023-08-11 佛山市顺德区美的电热电器制造有限公司 运行控制方法、设备、烹饪器具和计算机可读存储介质
WO2020211677A1 (fr) * 2019-04-17 2020-10-22 青岛海尔洗衣机有限公司 Pompe à eau de machine à laver et machine à laver
CN112998523B (zh) * 2019-12-19 2022-12-06 九阳股份有限公司 一种食品加工机的进水检测方法和食品加工机
CN113057872B (zh) * 2021-04-12 2022-07-08 四川千里倍益康医疗科技股份有限公司 电动按摩器及其与人体接触状态判断方法、降噪控制方法
CN115706555B (zh) * 2021-08-06 2023-12-19 南京泉峰科技有限公司 电动工具及其控制方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5814957A (en) * 1996-02-14 1998-09-29 Matsushita Electric Industrial Co., Ltd. Direct current brushless motor and driving method therefor
CN101176252A (zh) * 2006-07-07 2008-05-07 松下电器产业株式会社 无刷电机驱动电路和具有它的电机
CN101183844A (zh) * 2006-11-14 2008-05-21 株式会社电装 电机驱动装置和方法
JP2014039724A (ja) * 2012-08-23 2014-03-06 Toshiba Corp 洗濯機
CN103684120A (zh) * 2012-09-03 2014-03-26 峰岹科技（深圳）有限公司 一种有感无刷直流电机驱动方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4218572B2 (ja) * 2004-04-07 2009-02-04 パナソニック株式会社 食器洗い機のモータ駆動装置
CN101725011B (zh) * 2008-11-03 2011-12-07 博西华电器（江苏）有限公司 洗衣机及其控制方法
PL2439840T3 (pl) * 2010-10-11 2016-11-30 Sposób sterowania pompą spustową urządzenia gospodarstwa domowego i moduł sterujący służący do realizacji wspomnianego sposobu
CN102183900B (zh) * 2011-03-23 2013-03-27 卧龙电气集团股份有限公司 低噪节能的空气净化器及其工作方法
CN102505426A (zh) * 2011-11-08 2012-06-20 海尔集团公司 洗衣机排水泵装置及其洗衣机
CN202786830U (zh) * 2012-08-08 2013-03-13 海尔集团公司 一种降低洗衣机排水噪音的排水系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5814957A (en) * 1996-02-14 1998-09-29 Matsushita Electric Industrial Co., Ltd. Direct current brushless motor and driving method therefor
CN101176252A (zh) * 2006-07-07 2008-05-07 松下电器产业株式会社 无刷电机驱动电路和具有它的电机
CN101183844A (zh) * 2006-11-14 2008-05-21 株式会社电装 电机驱动装置和方法
JP2014039724A (ja) * 2012-08-23 2014-03-06 Toshiba Corp 洗濯機
CN103684120A (zh) * 2012-09-03 2014-03-26 峰岹科技（深圳）有限公司 一种有感无刷直流电机驱动方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3567718A3 (fr) * 2018-05-10 2020-03-04 Guangdong Boyu Group Co., Ltd Circuit de commande et procédé appliqué à un dispositif de pompage, dispositif de pompage et équipement d'aquarium

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