WO2011090021A1 - Moteur synchrone à courant alternatif monophasé et procédé de commande associé - Google Patents

Moteur synchrone à courant alternatif monophasé et procédé de commande associé Download PDF

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Publication number
WO2011090021A1
WO2011090021A1 PCT/JP2011/050733 JP2011050733W WO2011090021A1 WO 2011090021 A1 WO2011090021 A1 WO 2011090021A1 JP 2011050733 W JP2011050733 W JP 2011050733W WO 2011090021 A1 WO2011090021 A1 WO 2011090021A1
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Prior art keywords
phase
synchronous
motor
voltage
synchronous motor
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PCT/JP2011/050733
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English (en)
Japanese (ja)
Inventor
芳春 佐藤
直也 宮澤
幸一 谷口
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スタンダード電気株式会社
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Publication of WO2011090021A1 publication Critical patent/WO2011090021A1/fr

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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
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/20—Arrangements for starting

Definitions

  • the present invention relates to a single-phase AC synchronous motor and a control method thereof.
  • Patent Document 1 discloses a single-phase AC synchronous motor that can perform stable synchronous pull-in while suppressing the occurrence of reverse rotational torque during start-up operation.
  • the single-phase AC synchronous motor of Patent Document 1 has a start-up operation circuit that switches the start-up switching means by a detection signal from a detection sensor that detects the magnetic pole position of the permanent magnet rotor and switches the direction of the motor current to energize.
  • the single-phase AC synchronous motor can be started up as a DC brushless motor.
  • the single-phase AC synchronous motor of Patent Document 1 has at least a motor current waveform whose phase is delayed from the output waveform of the detection sensor when the rotational speed of the permanent magnet rotor reaches a predetermined rotational speed near the synchronous rotational speed.
  • the start-up operation is performed while suppressing the energization range of the motor current so that the energization direction is switched at the zero cross point. Thereby, generation
  • the present invention is intended to further improve a special motor as disclosed in Patent Document 1, and an object thereof is to provide a single-phase AC synchronous motor capable of increasing the use efficiency or operating rate of the motor and a control method thereof. To do.
  • the single-phase AC synchronous motor of the present invention detects the magnetic pole position of the permanent magnet rotor by converting the AC voltage supplied from the single-phase AC power source into a DC voltage to the motor coil connected to the single-phase AC power source.
  • the starting switching means By switching the starting switching means with the detection signal from the sensor to switch the direction of energization of the motor voltage and energizing, a starting operation circuit for starting operation as a DC brushless motor and an AC voltage are applied to the motor coil.
  • the control unit is At least one or more of lock stop, rotation speed excess / deficiency or reverse rotation can be detected, and the control means Counting, when the count number is equal to or less than a predetermined multiple restarts the startup operation, when exceeding a predetermined plurality of times and performs control to stop the operation.
  • the single phase alternating current synchronous motor of this invention converts the alternating voltage energized from the said single phase alternating current power supply into a direct current voltage to the motor coil connected to a single phase alternating current power supply, and is a permanent magnet rotor.
  • a startup operation circuit that starts up as a DC brushless motor by switching the startup switching means based on a detection signal from a sensor that detects the magnetic pole position and switching the direction of energization of the motor voltage, and an AC voltage to the motor
  • a single-phase AC synchronous motor having a synchronous operation circuit that energizes a coil and operates synchronously as an AC synchronous motor, and a control unit that controls switching from a startup operation circuit to a synchronous operation circuit to shift to synchronous operation
  • the control means detects at least lock stop in the initial stage, counts the number of detections, and in the later stage, locks Stop, over / under rotation speed and reverse rotation are detected, and when the total count is less than a predetermined number of times, the start-up operation is resumed, and when it exceeds a predetermined number of times, the operation is stopped.
  • a permanent magnet rotor is configured by converting an AC voltage supplied from the single-phase AC power source into a DC voltage to a motor coil connected to the single-phase AC power source.
  • the starting switching circuit is switched by the detection signal from the sensor that detects the magnetic pole position of the motor, and the direction of energization of the motor voltage is switched to energize, thereby starting the operating circuit as a DC brushless motor, and the AC voltage.
  • a single-phase AC synchronous motor having a synchronous operation circuit that energizes a motor coil and performs synchronous operation as an AC synchronous motor, and a control unit that controls switching from a start operation circuit to a synchronous operation circuit to shift to synchronous operation
  • the control means has a counter for counting the number of times of abnormality, and when the counted number is equal to or less than a predetermined number of times, When the number of times exceeds a predetermined number of times, control is performed to stop the operation, and during start-up operation and synchronous operation before shifting to synchronous operation, either lock stop, excessive or insufficient rotational speed, or reverse rotation When one of them is detected, the detection is regarded as abnormal, and control is performed to notify the counter.
  • control means weights the lock stop, rotation speed excess / deficiency, and reverse rotation, and when the lock stop / rotation speed excess / inversion or reverse rotation occurs once, the lock stop, rotation speed excess / deficiency occurs.
  • control for notifying a value obtained by multiplying the weighting assigned to each reverse rotation.
  • control means can detect the lock stop in the initial stage of the start-up operation, and can detect all of the lock stop, excess or deficiency of the rotation speed, and reverse rotation in the latter period.
  • Still another aspect of the single-phase AC synchronous motor of the present invention is that a motor coil connected to a single-phase AC power supply is converted into a DC voltage from an AC voltage supplied from the single-phase AC power supply, and the magnetic pole of the permanent magnet rotor A start-up operation circuit for starting operation as a DC brushless motor by switching the start-up switching means according to the detection signal from the position detection sensor and switching the energization direction of the motor voltage, and an AC voltage to the motor coil
  • a single-phase AC synchronous motor having a synchronous operation circuit that is synchronously operated as an AC synchronous motor and a control unit that controls to switch from the start operation circuit to the synchronous operation circuit and shift to the synchronous operation,
  • the control means performs switching control of the starting switching means according to the detection signal of the sensor and energizes the motor coil.
  • At least one or more of lock stop, excessive or insufficient rotation speed, or reverse rotation can be detected.
  • the number of times of detection is counted, and when the count number is equal to or less than a predetermined number of times, the start-up operation is resumed, and when it exceeds a predetermined number of times, control is performed to stop the operation.
  • the control means is generated based on the frequency information of the single-phase AC power source acquired in advance instead of the sensor detection signal. It is possible to detect at least one or more of lock stop, excessive or insufficient rotation speed, or reverse rotation when the start-up operation is performed to control the start-up switching means in accordance with the internal synchronization signal, and then the operation shifts to the synchronous operation.
  • the control means counts the number of times of detection, and when the number of counts is equal to or less than a predetermined number of times, the starting operation is restarted, and when exceeding the predetermined number of times, control is performed to stop the operation.
  • control means can be performed from the measurement of the frequency of the single-phase AC power supply when the operation is resumed.
  • a timer for counting the time required for the start-up operation may be provided, and the control means may stop the start-up operation and increase the count number of the counter when the time counted by the timer exceeds or exceeds a predetermined time.
  • control means may detect an abnormality of the single-phase AC power supply in addition to detecting lock stop, excessive or insufficient rotation speed, or reverse rotation.
  • another aspect of the present invention is a viewpoint as a method for controlling a single-phase AC synchronous motor. That is, the method for controlling a single-phase AC synchronous motor according to the present invention converts the AC voltage supplied from the single-phase AC power source into a DC voltage to a motor coil connected to the single-phase AC power source, and converts the magnetic pole of the permanent magnet rotor.
  • the starting switching means By switching the starting switching means according to the detection signal from the position detection sensor to switch the direction of energization of the motor voltage and energizing, a start operation step for starting operation as a DC brushless motor and a transition from the start operation step are performed.
  • the starting operation step includes at least locking stop, excessive or insufficient rotational speed, or reverse rotation.
  • the number of detections is counted, and the number of counts is a predetermined number of times When the bottom, and resume the boot operation, and has a step of performing control to stop the operation when exceeding a predetermined plurality of times.
  • the special motor as in Patent Document 1 can be further improved, and the use efficiency or operating rate of the motor can be increased.
  • FIG. 1 It is a block block diagram of the single phase alternating current synchronous motor which concerns on 1st embodiment of this invention. It is a flowchart which shows the control procedure of the single phase alternating current synchronous motor which the control part shown in FIG. 1 performs. It is a figure for demonstrating operation
  • FIG. 1 It is a figure which shows the single phase alternating current synchronous motor which concerns on 2nd embodiment of this invention, and is a block block diagram of a single phase alternating current synchronous motor provided with the control part which has the monitoring procedure of a starting state. It is a flowchart which shows the control procedure of the control part of FIG. It is the figure which made the table
  • the single-phase AC synchronous motor 1 is driven by receiving power from the single-phase AC power supply 2.
  • the single-phase AC synchronous motor 1 includes a rectifier bridge circuit 10, a smoothing filter circuit 11, an H bridge circuit 12, a synchronous operation circuit 13, an AC (AC) detection circuit 14, a DC power supply 15, and a DC power supply 16.
  • the control unit 19 includes a counter 41.
  • the single-phase AC synchronous motor 1 is supplied with power from the terminals ACH and ACL of the single-phase AC power source 2.
  • the single-phase AC power source 2 is assumed to be a commercial power source such as 100 V / 50 Hz, 100 V / 60 Hz, or 110 V / 60 Hz.
  • the frequency of the single-phase AC power source 2 applicable to the single-phase AC synchronous motor is, for example, 40 Hz. Any of those within the range of ⁇ 75 Hz is applicable.
  • ACH-ACL represents a terminal voltage between the terminal ACH and the terminal ACL.
  • the rectifier bridge circuit 10 that is a part of the start-up operation circuit is composed of four diodes d1, d2, d3, and d4.
  • the rectifier bridge circuit 10 performs full-wave rectification on the AC voltage supplied from the single-phase AC power supply 2 by using four diodes d1, d2, d3, and d4.
  • the smoothing filter circuit 11 which is a part of the start-up operation circuit is constituted by one electrolytic capacitor, and generates a DC voltage obtained by smoothing the full-wave rectified waveform output from the rectifying bridge circuit 10.
  • the H-bridge circuit 12 that is a part of the startup operation circuit includes startup switching elements 21 to 24 and an FET (field effect transistor) drive circuit 25.
  • the startup switching elements 21 to 24 are constituted by a combination of four pairs of FETs and diodes. By appropriately ON / OFF controlling these four startup switching elements 21 to 24, it is possible to energize the motor coil 30 of the motor unit 18 in a desired direction. Thereby, the control part 19 can control the voltage electricity supply direction of the motor coil 30 so that the permanent magnet rotor 31 of the motor part 18 continues rotation in a predetermined
  • the FET drive circuit 25 controls the switching of the startup switching elements 21 to 24 according to the control of the control unit 19 and changes the duty ratio of the voltage supplied to the motor coil 30 of the motor unit 18. Thereby, the control unit 19 can control the voltage value supplied to the motor coil 30 of the motor unit 18.
  • the synchronous operation circuit 13 which is a part of the circuit for synchronous operation is composed of two triacs tr1 and tr2.
  • the two triacs tr1 and tr2 are turned ON / OFF under the control of the control unit 19.
  • the synchronous operation circuit 13 does not operate when the motor unit 18 is activated under the control of the control unit 19, and a voltage is supplied to the motor coil 30 from the H bridge circuit 12.
  • the control unit 19 does not operate the H bridge circuit 12.
  • the motor coil 30 is energized from the single-phase AC power supply 2 via the synchronous operation circuit 13.
  • the driving method at the time of starting is called “H bridge driving”
  • the driving method at the time of synchronous operation is called “triac driving”.
  • the AC detection circuit 14 detects the frequency of the single-phase AC power supply 2 and transmits the detection result to the control unit 19.
  • the DC power supply 15 in this embodiment converts (for example, steps down) the output voltage of the smoothing filter circuit 11 to 14.2V.
  • the DC power supply 15 supplies 14.2 V DC power to the FET drive circuit 25 of the H bridge circuit 12.
  • the FET drive circuit 25 is supplied with DC power from the DC power supply 15 and operates.
  • the DC power supply 16 in this embodiment steps down the 14.2V output voltage of the DC power supply 15 to 5V.
  • the DC power supply 16 supplies 5V DC power to the control unit 19 and supplies 5V DC power to the sensors 32A and 32B via the transistors constituting the sensor power switch 17.
  • the sensor power switch 17 turns ON / OFF the power supply from the DC power supply 16 to the sensors 32A and 32B under the control of the control unit 19.
  • the motor unit 18 includes a permanent magnet rotor 31 having an output shaft and a permanent magnet, a stator (not shown) that rotates the permanent magnet rotor 31 by applying a magnetic field, and sensors 32A and 32B.
  • the permanent magnet rotor 31 is a two-pole permanent magnet rotor having one N pole and one S pole.
  • the motor coil 30 is wound around each stator having two poles. When two magnetic poles are connected in series, and one pole is excited to N pole, the other pole becomes S pole. They are connected and wound so as to be excited.
  • the motor coil 30 generates a magnetic field when a voltage is applied.
  • the permanent magnet rotor 31 can be rotated in a predetermined direction by an AC magnetic field generated by the motor coil 30.
  • the motor unit 18 is supplied with power from terminals ACH1 and ACL1.
  • ACH1-ACL1 represents a terminal voltage between the terminal ACH1 and the terminal ACL1.
  • the two sensors 32A and 32B it is possible to detect whether the permanent magnet rotor 31 is rotating in the forward (clockwise) direction or rotating in the reverse (counterclockwise) direction. That is, the single-phase AC synchronous motor 1 can freely switch between the operation in the forward direction and the operation in the reverse direction by controlling the direction in which the H bridge circuit 12 supplies the voltage to the motor coil 30. At this time, by having the two sensors 32A and 32B, it is possible to correspond to either the forward rotation direction or the reverse rotation direction. In the following description, the sensors 32A and 32B are simply referred to as sensors 32 when it is not necessary to distinguish them individually.
  • the sensor 32 is, for example, a Hall element, and is supplied with power (5 V) from the DC power supply 16 via a transistor constituting the sensor power switch 17.
  • the sensor 32 detects the magnetic pole position of the permanent magnet rotor 31.
  • the control unit 19 detects the rotation state of the permanent magnet rotor 31 from the output of the sensor 32 and controls the motor unit 18.
  • the control unit 19 performs control based on the output of the sensor 32A (hereinafter referred to as output PA) when the permanent magnet rotor 31 rotates in the forward direction, and outputs the sensor 32B (hereinafter referred to as “output”) when the permanent magnet rotor 31 rotates in the reverse direction. Control is performed with reference to output PB).
  • the control unit 19 is a CPU (Central Processing Unit), memory, input / output ports, etc. ASIC (Application instead of CPU) Specific Integrated Circuit), microprocessor (microcomputer), DSP (Digital Signal Processor) may be used.
  • the control unit 19 is also part of the startup operation circuit and part of the synchronous operation circuit. The control unit 19 also controls switching from the start operation to the synchronous operation.
  • the control unit 19 controls the activation switching elements 21 to 24 via the FET drive circuit 25 of the H bridge circuit 12 to energize the motor coil 30 of the motor unit 18 with a voltage in a desired energization direction.
  • the duty ratio is changed. That is, the control unit 19 controls the FET drive circuit 25 to appropriately cut off the voltage applied to the motor coil 30, change the duty ratio of the voltage supplied to the motor coil 30, and vary the voltage value. Can do.
  • the duty control performed by the control unit 19 changes the duty ratio of PWM (Pulse Width Modulation), and the duty ratio at the start can be controlled to 25% and up to 96%. In addition, the increase / decrease when switching the duty ratio can be executed in units of 0.2%.
  • control unit 19 performs a start-up operation using an internal synchronization signal generated based on the detection result of the AC detection circuit 14.
  • the start-up operation at this time is the operation method immediately before shifting to the synchronous operation.
  • control unit 19 enables the synchronous operation by turning off the H bridge circuit 12 and turning on the synchronous operation circuit 13. That is, the control unit 19 performs a synchronous operation with the frequency of the single-phase AC power supply 2 on the motor unit 18 whose number of rotations has increased to a predetermined number of rotations.
  • the internal synchronization signal is an internal clock of the control unit 19 that is substantially synchronized with the frequency of the single-phase AC power supply 2 detected by the AC detection circuit 14.
  • the internal synchronization signal has a frequency slightly lower than the frequency of the single-phase AC power supply 2.
  • control unit 19 can input / output operation command input, error output, external reset input, and manual setting input.
  • the user can start the single-phase AC synchronous motor 1 by connecting the single-phase AC power supply 2 to the single-phase AC synchronous motor 1 and then inputting an operation command signal to the control unit 19.
  • the control unit 19 can output the occurrence of abnormality as an abnormal output to the outside.
  • the user can recognize the occurrence of an abnormality in the single-phase AC synchronous motor 1 by receiving the abnormal output output by the control unit 19 with a predetermined terminal device or the like.
  • the control part 19 will return a control state to an initial state, if an external reset input is received.
  • the control part 19 can also set the numerical value or state which a user sets in the control part 19 by receiving a manual setting input. Since the embodiment using such user settings is not directly related to the present embodiment, detailed description thereof is omitted.
  • the counter 41 of the control unit 19 indicates the number of times that the permanent magnet rotor 31 has been locked and stopped in low speed driving (step S2), high speed driving (step S3), and internal synchronization signal driving (step S4) in the control procedure described later. To count.
  • the control unit 19 performs the start-up operation of the motor unit 18 according to the control procedure of steps S1 to S6, then shifts from the start-up operation to the synchronous operation, and then performs the synchronous operation with high conversion efficiency. Let it continue.
  • Step S1 The control unit 19 measures the frequency (AC cycle) of the single-phase AC power supply 2 by the AC detection circuit 14, and thereby sets the synchronization speed of the motor unit 18.
  • This synchronization speed is a speed corresponding to the power supply frequency of the single-phase AC power supply 2.
  • Step S2 The control unit 19 starts driving the motor unit 18 at a low speed. This low speed driving corresponds to the first half of the first start-up operation. Specifically, the control unit 19 turns off the synchronous operation circuit 13 and connects the H bridge circuit 12 and the motor coil 30 of the motor unit 18. Then, the control unit 19 controls the activation switch elements 21 to 24 of the H bridge circuit 12 via the FET drive circuit 25 to energize the motor coil 30 with a voltage for rotating the permanent magnet rotor 31 in the forward direction. Gradually increase the duty ratio.
  • FIG. 3 shows the state of the output PA, the operation period and duty ratio of the H-bridge circuit 12, and the terminal voltage (ACH1-ACL1) of the motor coil 30 in step S2.
  • the upper part of FIG. 3 represents a change in the output PA of the sensor 32A.
  • the output PB of the sensor 32B is omitted.
  • the middle part of FIG. 3 represents the operation period of the H-bridge circuit 12 and the duty ratio of the voltage supplied to the motor unit 18.
  • the duty ratio indicates a voltage on / off value, which is 100% when the entire period is on, and 50% when half of the period is on. For this reason, the duty ratio indicates what percentage of the H bridge circuit 12 is energized to the motor unit 18 with respect to the maximum voltage value that can energize the motor unit 18.
  • the lower part of FIG. 3 represents a change in the terminal voltage (ACH1-ACL1) of the motor coil 30 by a change in the height of the square. That is, in the lower part of FIG. 3, the higher the square height, the higher the terminal voltage (ACH1-ACL1) of the motor coil 30.
  • the duty ratio is switched for each edge of the output PA and gradually increased.
  • the reason why the duty ratio switching timing is set for each edge of the output PA is that the timing can be easily grasped if it is an edge. Therefore, the duty ratio switching timing is not limited to the edge of the output PA, and may be any timing of the output PA as long as the timing can be specified.
  • the control unit 19 energizes the motor coil 30 in synchronization with the output PA of the sensor 32A during clockwise rotation.
  • a voltage is applied so as to synchronize with the output PB of the sensor 32B.
  • the control unit 19 performs a soft start that gradually increases the duty ratio of the voltage that is applied to the motor coil 30 from the initial stage of startup.
  • the duty ratio starts from 25% and increases by 2% from 41%.
  • the control unit 19 performs control to increase the duty by 2% when detecting the edge of the output PA.
  • step S2 all 180 degrees corresponding to a half cycle of the full-wave rectified waveform are used. That is, the motor coil 30 is energized with a voltage having a rectangular wave shape in which the direction of energization alternately with a cycle of 180 degrees is reversed.
  • step S3 the second half of the first start-up operation is performed.
  • Step S3 The control unit 19 starts high-speed driving of the motor unit 18.
  • FIG. 4 shows the state of the output PA, the operation period and duty ratio of the H-bridge circuit 12, the invalidation signal, and the terminal voltage (ACH1-ACL1) of the motor coil 30 in step S3.
  • the upper part of FIG. 4 represents a change in the output PA of the sensor 32A. 4 represents the operation period of the H-bridge circuit 12 and the duty ratio (41% to 96%) of the voltage applied to the motor coil 30.
  • the third stage in FIG. 4 represents an invalidation signal that prevents the H bridge circuit 12 from operating by a signal sent from the control unit 19 to the H bridge circuit 12.
  • the lowermost stage in FIG. 4 represents a change in the terminal voltage (ACH1-ACL1) of the motor coil 30.
  • This terminal voltage state is ideal, and is actually slightly delayed from the output PA.
  • 4 shows the continuation of the waveform shown in FIG. 3, and the waveform indicated by a and b in FIG. 3 is the same as the waveform indicated by a and b in FIG. . That is, the vertical and horizontal scales are changed between FIG. 3 and FIG. Further, in relation to the waveforms with c and d in FIG. 4, a ⁇ c and b ⁇ d are satisfied.
  • the controller 19 energizes the motor coil 30 so as to be synchronized with the output PA of the sensor 32A. Also in this example, every time the edge of the output PA is detected, the duty ratio is increased by 2%. At this time, the control unit 19 performs the start-up operation by cutting off the voltage supplied to the motor coil 30 from a predetermined time before the timing at which the energization direction is switched every half cycle. As a result, as shown at the bottom of FIG. 4, the terminal portion of the waveform of the terminal voltage (ACH1-ACL1) of the motor coil 30 is cut. In addition, the hatching part in a figure is a part cut.
  • the direction of the voltage applied to the motor coil 30 is surely switched near the zero cross point of the output PA. Thereby, it is possible to cut the motor current that causes the permanent magnet rotor 31 to generate reverse torque.
  • step S4 is the second start-up operation.
  • Step S4 The control unit 19 starts driving based on the internal synchronization signal of the motor unit 18.
  • FIG. 5 shows the state of the internal synchronization signal, the operation period and duty ratio of the H-bridge circuit 12, the invalidation signal, and the terminal voltage (ACH1-ACL1) of the motor coil 30 in step S4.
  • the upper part of FIG. 5 represents a change in the internal synchronization signal based on the frequency of the single-phase AC power supply 2 acquired by the control unit 19 from the AC detection circuit 14 in step S1.
  • the internal synchronization signal is fixed and does not change.
  • the internal synchronization signal is 90% of the frequency of the single-phase AC power supply 2. For example, when the frequency of the single-phase AC power supply 2 is 60 Hz, the internal synchronization signal is 54 Hz.
  • the second level in FIG. 5 represents the duty ratio (96%) of the voltage supplied from the H bridge circuit 12 to the motor coil 30. In this example, the duty ratio is fixed at 96%.
  • the third row in FIG. 5 represents an invalidation signal that prevents the H bridge circuit 12 from being operated by a signal sent from the control unit 19 to the H bridge circuit 12.
  • 5 represents a change in the terminal voltage (ACH1-ACL1) of the motor coil 30 in an ideal state. 5 shows the continuation of the waveform shown in FIG. 4, and the waveform indicated by c and d in FIG. 4 is the same as the waveform indicated by c and d in FIG. That is, the vertical and horizontal scales are changed between FIG. 4 and FIG.
  • the control unit 19 energizes the motor coil 30 to synchronize with the internal synchronization signal.
  • the control unit 19 performs a start-up operation by cutting off the voltage supplied to the motor coil 30 from a predetermined time before the timing at which the energization direction is switched every half cycle.
  • the terminal portion of the waveform of the terminal voltage (ACH1-ACL1) of the motor coil 30 is cut. Thereby, it is possible to cut the motor voltage that causes the permanent magnet rotor 31 to generate reverse torque.
  • the control unit 19 controls at a frequency slightly lower than the frequency of the single-phase AC power supply 2 acquired by the AC detection circuit 14, in this example, 10% smaller.
  • the frequency of the single-phase AC power supply 2 output from the AC detection circuit 14 is larger than the frequency of the internal synchronization signal, the frequency cycle of the single-phase AC power supply 2 becomes faster.
  • the phase of the frequency of the single-phase AC power supply 2 always has a timing to catch up with the phase of the frequency of the internal synchronization signal.
  • the control unit 19 compares the phase of the frequency of the internal synchronization signal with the phase of the frequency of the single-phase AC power supply 2 output from the AC detection circuit 14, and the phase difference between the two is within 12 degrees to 15 degrees in electrical angle. If it is within the range, the process proceeds to step S5. Each phase is detected at the falling edge or rising edge of the internal synchronization signal or at the zero cross point of the frequency of the single-phase AC power supply 2.
  • Step S5 The control unit 19 starts AC synchronous driving of the motor unit 18.
  • FIG. 6 shows the internal synchronization signal, the terminal voltage (ACH1-ACL1) of the motor coil 30 and the frequency of the single-phase AC power supply 2 in the transition from the start-up operation to the synchronous operation.
  • the upper part of FIG. 6 represents the state of the internal synchronization signal based on the frequency of the single-phase AC power supply 2 acquired by the control unit 19 from the AC detection circuit 14 in step S1.
  • a stage one level lower than the internal synchronization signal in FIG. 6 represents a change in the terminal voltage (ACH1-ACL1) of the motor coil 30.
  • the timing of the change of the internal synchronization signal (rising point, falling point) and the timing of the change of the frequency of the single-phase AC power supply 2 (rising point, falling point) are shown. Shows the relationship.
  • the control unit 19 controls the synchronous operation circuit 13 to ON and controls the H bridge circuit 12 to OFF. Specifically, when the difference between the falling edge of the internal synchronizing signal and the zero crossing point of the falling edge of the frequency of the single-phase AC power supply 2 is within 1 ms, the operation is switched to AC synchronous driving. Thereby, the connection between the H-bridge circuit 12 and the motor coil 30 is released, and the single-phase AC power supply 2 and the motor coil 30 are directly connected. As a result, the motor unit 18 enters an AC synchronous drive state.
  • the AC synchronous drive may be started when the rising edges of the signals substantially coincide.
  • the controller 19 controls the time between Step S2 and Step S4, which are H-bridge drive, to be 10 seconds or less.
  • the number of seconds is preferably 4 to 20 seconds, and more preferably 6 to 10 seconds in terms of vibration countermeasures and motor efficiency.
  • the control unit 19 proceeds to the process of step S6 when the motor unit 18 enters the AC synchronous drive state and 5 seconds or more have elapsed. Instead of the value of 5 seconds, it may be 10 seconds or 3 seconds.
  • Step S6 The control unit 19 starts power saving driving in AC synchronous driving of the motor unit 18.
  • the control unit 19 performs ON / OFF control of the sensor 32 at a predetermined cycle.
  • FIG. 7 shows the frequency of the single-phase AC power supply 2, the terminal voltage of the motor coil 30 (ACH1-ACL1), and the sensor power supply in this power-saving drive.
  • the power (sensor power) of the sensor 32 that is continuously supplied in the AC synchronous drive (S5) is intermittently supplied in the power saving drive (S6). This period is set so that, for example, the sensor 32 is ON for 0.12 seconds and OFF for 1 second.
  • FIG. 7 shows an example in which the frequency of the single-phase AC power supply is 50 Hz.
  • the control unit 19 performs a case where the permanent magnet rotor 31 is locked and stopped in each step of low speed driving (step S2), high speed driving (step S3), and internal synchronization signal driving (step S4).
  • the number of times is counted by the counter 41 (this is called an abnormal number count).
  • the control part 19 restarts a starting driving
  • the control unit 19 stops the operation.
  • the predetermined number of times is “four times”.
  • the single-phase AC synchronous motor 1 that can handle any frequency within the range of 40 Hz to 75 Hz, for example, can be realized.
  • the control unit 19 can automatically measure the frequency of the single-phase AC power supply 2 based on the detection output of the AC detection circuit 14, it is possible to save the user from manual setting. That is, the user can use the single-phase AC synchronous motor 1 without having to confirm the power supply frequency accurately and without having to manually set the frequency.
  • control unit 19 performs soft start in the low-speed driving of step S2 to simultaneously start a large number of single-phase AC synchronous motors 1
  • a load on power supply equipment that supplies power to the large number of single-phase AC synchronous motors 1 Can be reduced. According to this, it is possible to avoid a decrease in power supply voltage due to the simultaneous activation of a large number of single-phase AC synchronous motors 1 and to enable the activation of a large number of single-phase AC synchronous motors 1 at the same time.
  • control unit 19 performs pseudo 120-degree energization in the high-speed driving in step S3, generation of reverse rotation torque in the start-up operation can be suppressed, and the rotation efficiency is increased.
  • This is the same effect as the single-phase AC synchronous motor of Patent Document 1.
  • the energization direction is switched at the zero cross point of the sensor output waveform in the motor current waveform.
  • complicated control such as starting operation while suppressing the energization range of the motor current is not required.
  • this single-phase AC synchronous motor 1 the generation of reverse rotational torque is suppressed by a simple method of pseudo 120-degree energization.
  • control unit 19 when the control unit 19 performs the internal synchronization signal drive in step S4, the motor unit 18 can be driven by the internal synchronization signal without depending on the output of the sensor 32.
  • the control part 19 compares the frequency of the single phase alternating current power supply 2 acquired by the detection output of the AC detection circuit 14 with the internal synchronous signal which drives the H bridge circuit 2, and the timing for switching to synchronous operation Can be recognized. That is, the control unit 19 does not recognize the switching timing to the synchronous operation by the output waveform of the sensor 32 whose frequency is difficult to stabilize, but has an internal synchronization that has a stable cycle and coincides with the actual motor energization timing. The switching timing to the synchronous operation can be recognized by the signal.
  • step S4 since the synchronizing signal phase is switched to the next step S5 when the electrical angle of the voltage phase is within 12 to 15 degrees, further stable switching can be performed.
  • control unit 19 performs the AC synchronous drive in step S5 for 5 seconds or more, so that the synchronous operation can be stabilized.
  • This AC synchronous drive is preferably 3 to 20 seconds, and more preferably 5 to 10 seconds.
  • the power consumption of the sensor 32 can be saved because the control part 19 performs the power saving drive of step S6. That is, in the AC synchronous drive state, the role of the sensor 32 is only to detect an abnormal situation such as the motor unit 18 being stopped or reversed due to an unexpected factor. The probability of these abnormal situations occurring when AC synchronous driving is extremely low. Therefore, in the AC synchronous drive state, it is not necessary to keep the sensor 32 in the ON state at all times.
  • the control unit 19 can save the power consumption of the sensor 32 by intermittently energizing the sensor 32 in the power saving driving of step S6.
  • control unit 19 counts the number of lock stops by the counter 41, and the start-up operation can be restarted when the number of lock stops is equal to or less than a predetermined number. Thereby, the utilization efficiency or operating rate of a motor can be kept high.
  • FIG. 8 shows a block configuration of a single-phase AC synchronous motor 1A having the control unit 19A.
  • the control procedure of the control unit 19A is different from that of the control unit 19 of the single-phase AC synchronous motor 1. Since the single-phase AC synchronous motor 1A is otherwise the same as the single-phase AC synchronous motor 1, the same members will be described using the same reference numerals, and detailed description thereof will be omitted.
  • the control unit 19A includes a watchdog timer 40, a counter 41, and a timer 42.
  • the watchdog timer 40 is for detecting an abnormality such as when the control unit 19A hangs up without starting up.
  • the counter 41 counts the number of times that the motor unit 18 has stopped locking, rotation speed is insufficient, or reverse rotation.
  • the timer 42 is a timer that measures the time from the start of low speed driving to the end of internal synchronization signal driving.
  • the control procedure of the control unit 19A is shown in FIG.
  • the process flow indicated by the solid-line arrows is a process flow when no abnormality occurs.
  • the flow of processing indicated by broken-line arrows in FIG. 9 is the flow of processing when an abnormality occurs. That is, for the RUN / OFF signal indicated by the solid line arrow in steps S2A, S3A, S4A, S5A, and S6A, the single-phase AC synchronous motor is used when the user turns off the power supply of the single-phase AC synchronous motor 1A. This is output when 1A is normally stopped.
  • the RUN / OFF signal indicated by the broken-line arrow from “abnormal output” is output when the number of abnormal counts is equal to or greater than a predetermined number.
  • step S1A to step S6A is basically the same as the processing of START and step S1 to step S6 in the flowchart of FIG. 2, and therefore the description thereof will be omitted or simplified.
  • Step S10 When the DC voltage is supplied from the DC power supply 16, the control unit 19A detects this and moves to the process of Step S11. That is, the reset process is the first process that starts the flow. Further, the control unit 19A executes a reset process when detecting a decrease in voltage energized from the DC power supply 16 (for example, “3.6 ⁇ 0.3 V or less”). Even when the flow has already progressed, the control unit 19A executes the reset process when detecting a decrease in the voltage supplied from the DC power supply 16. As a result, when the control unit 19A detects a decrease in the voltage supplied from the DC power supply 16, the flow returns to the first process.
  • the reset process is the first process that starts the flow. Further, the control unit 19A executes a reset process when detecting a decrease in voltage energized from the DC power supply 16 (for example, “3.6 ⁇ 0.3 V or less”). Even when the flow has already progressed, the control unit 19A executes the reset process when detecting a decrease in the voltage supplied from the DC power supply
  • the control unit 19A regards the CPU as being hung up and executes the reset process again.
  • the set value of the watchdog timer 40 is, for example, about 525 ms or more. Further, the control unit 19A executes the reset process even when the user manually inputs an external reset.
  • Step S11 The control unit 19A sets the set values of the counter 41 and the timer 42 to initial values (for example, “0”). In addition, the control unit 19A assigns input / output to each port of the control unit 19A. In addition to the counter 40 and the timer 41 described above, the control unit 19A sets internal setting values (for example, the values of outputs PA and PB (H or L) of the sensor 32) as initial values. Furthermore, data is read from the outside to the control unit 19A as necessary. When the initial setting is completed, the control unit 19A proceeds to the process of step S12.
  • Step S12 When the single-phase AC synchronous motor 1 stopped normally last time, a RUN / OFF flag is set in the CPU register (not shown) of the control unit 19A. Under such circumstances, when the operation command signal is input, the control unit 19A proceeds to the process of step S1A. Further, when the RUN / ON flag of the register is released and the RUN / OFF flag is set, the control unit 19A stops the subsequent processing until the next operation command signal is input. Further, after the RUN / OFF flag is set in the register and the subsequent processing is stopped, the control unit 19A cancels the RUN / OFF flag when the operation command signal is input, and proceeds to the processing of step S1A. . At this time, the control unit 19A sets a RUN / ON flag in the register. At this time, the control unit 19A clears the abnormal count value of the counter 41.
  • Step S1A In addition to the AC cycle measurement process described in step S1 of the flowchart of FIG. 2, the control unit 19A increments the abnormal count value of the counter 41 by 1 when the detection result of the AC detection circuit 14 is 0 Hz. .
  • the case where the detection result of the AC detection circuit 14 is 0 Hz is a state in which the frequency of the power source is not detected even though the power source of the single-phase AC power source 2 is supplied. Indicates an abnormality. If the detection result of the AC detection circuit 14 is other than 0 Hz in step S1A, the process proceeds to step S2A.
  • Step S2A In addition to the low-speed drive process described in Step S2 of the flowchart of FIG. 2, the control unit 19A increases the count value of the abnormal number of the counter 41 by one when the motor unit 18 is locked during the low-speed drive. Raise it. Further, the control unit 19A uses the timer 42 to count the time required for the process of step S2A.
  • Step S3A In addition to the high-speed driving process described in Step S3 of the flowchart of FIG. 2, the control unit 19A increases the count of abnormal times of the counter 41 by one when the motor unit 18 is locked during high-speed driving. Raise it. Further, the control unit 19A uses the timer 42 to count the time required for the processing in step S3A.
  • Step S4A In addition to the internal synchronization signal driving process described in step S4 of the flowchart of FIG. 2, the control unit 19A performs a lock stop, an excessive or insufficient rotation speed, or a reverse rotation during the internal synchronization signal driving. Increases the abnormal count value of the counter 41 by one. Further, the control unit 19A uses the timer 42 to count the time required for the processing in step S4A. When the total time measured by the timer 42 in steps S2A, S3A, and S4A is equal to or longer than a predetermined time (for example, 10 seconds), the control unit 19A stops the start-up operation, and increments the count value of the counter 41 by one. Raise it.
  • a predetermined time for example, 10 seconds
  • Step S5A In addition to the AC synchronous driving process described in Step S5 of the flowchart of FIG. 2, the control unit 19A performs a lock stop, an excessive or insufficient rotational speed, or a reverse rotation during the AC synchronous driving.
  • the counter 41 counts up the number of abnormal times by one.
  • Step S6A When 5 seconds or more have elapsed from Step S5A, the control unit 19A, in addition to the power saving driving process described in Step S6 of the flowchart of FIG. When excess or deficiency or reverse rotation is detected, the process returns to step S1A.
  • this power saving driving is entered, in addition to intermittent energization of the sensor 32, processing for clearing the counter 41 is performed.
  • Step S13 When the abnormality count of the counter 41 is equal to or smaller than the threshold value, the control unit 19A restarts the flow from the AC cycle measurement process in step S1A. Further, when the abnormality count of the counter 41 exceeds the threshold value, the control unit 19A outputs an abnormality, sets a RUN / OFF flag, and returns to the process of step S12.
  • the threshold value in step S13 can be set, for example, between “1” and “15”. For example, the threshold value is “3”.
  • control unit 19A sets a RUN / OFF flag in the register when the operation of the single-phase AC synchronous motor 1A is normally stopped (FIG. 9). Solid line arrow processing). As a result, the control unit 19A waits for input of the next operation command signal.
  • the start-up operation is stopped when the abnormal count of the counter 41 is, for example, 4 times or more. Further, when the time required for the processing from steps S2A to S4A exceeds a predetermined time (for example, 10 seconds) or exceeds a predetermined time, the start-up operation is once stopped and the abnormal number count of the counter 41 is incremented.
  • a predetermined time for example, 10 seconds
  • the single-phase AC synchronous motor 1A even if an abnormality occurs in the single-phase AC power source 2 due to some cause during start-up operation, or even if the motor unit 18 stops locking, excessive or insufficient rotation speed, or reverse rotation.
  • the activation can be repeated up to three times.
  • an abnormality occurs in the single-phase AC power source 2 due to some cause during the start-up operation, the motor unit 18 is locked, the rotation speed is excessively insufficient or reversed, or the start-up operation is performed. For example, if the state that takes too much time occurs 4 times or more, the activation is stopped.
  • the startup operation is temporarily stopped if a state that takes too much time (for example, 10 seconds or more) in steps S2A to S4A occurs once, but the abnormal count value is less than or less than a predetermined number. If so, the start-up operation is resumed.
  • the single-phase AC power supply 2 is cut off, or external force is applied to the permanent magnet rotor 31 for some reason, and the lock stop and rotation speed are Even if it is excessive or deficient or reversed, or even if it takes too much time for the start-up operation, the start-up operation is resumed if the number of occurrences of abnormality is not more than a predetermined number. For example, when the fan is provided on the rotating shaft of the permanent magnet rotor 31, the activation is resumed if the fan is lightly hit by an obstacle.
  • the startup is resumed even when the user performs an operation such as pulling out the outlet for a very short time and plugging in the outlet again.
  • the user can save troubles such as restarting the single-phase AC synchronous motor 1 ⁇ / b> A, so that convenience for the user can be improved.
  • the convenience of the user can be greatly improved. That is, the utilization efficiency or operating rate of the single-phase AC synchronous motor 1A can be kept high.
  • control units 19 and 19A of the single-phase AC synchronous motors 1 and 1A may be configured by a general-purpose information processing device that operates according to a predetermined program.
  • a general-purpose information processing apparatus has a memory, a CPU, an input / output port, and the like.
  • the CPU of the general-purpose information processing apparatus reads and executes a control program as a predetermined program from a memory or the like.
  • the functions of the control units 19 and 19A are realized in the general-purpose information processing apparatus.
  • functions that can be realized by software can be realized by a general-purpose information processing apparatus and a program.
  • An ASIC, a microprocessor (microcomputer), a DSP, or the like may be used instead of the CPU described above.
  • the control program executed by the general-purpose information processing apparatus may be a single-phase AC synchronous motor even if it is stored in the memory of the general-purpose information processing apparatus before the single-phase AC synchronous motor 1 or 1A is shipped. It may be stored in a memory or the like of a general-purpose information processing apparatus after the shipment of 1,1A. A part of the control program may be stored in a memory of a general-purpose information processing apparatus after the single-phase AC synchronous motors 1 and 1A are shipped. After the shipment of the single-phase AC synchronous motor 1 or 1A, the control program stored in the memory of a general-purpose information processing apparatus is installed, for example, as stored in a computer-readable recording medium such as a CD-ROM. Even what was downloaded may be installed via transmission media, such as the internet.
  • control program includes not only a program that can be directly executed by a general-purpose information processing apparatus but also a program that can be executed by installing it on a hard disk or the like. Also included are those that are compressed or encrypted.
  • control units 19 and 19A of the single-phase AC synchronous motor 1 and 1A are realized by a general-purpose information processing apparatus and program, so that mass production and specification changes (or design changes) can be flexibly handled. It becomes possible.
  • the embodiment of the present invention can be variously modified without departing from the gist thereof.
  • the predetermined number of abnormal counts is “4” in the flowchart of FIG. 2 and “3” in the flowchart of FIG. 9, but this numerical value can be variously changed.
  • the predetermined number of times may be large if the single-phase AC synchronous motors 1 and 1A are in an environment where frequent lock stops occur but the lock stops do not significantly affect the motor life.
  • a fan is attached to the output shaft of the permanent magnet rotor 31, and in an environment where a very lightweight object such as a small piece of polystyrene foam frequently collides with the fan, the lock stop is stopped. Although it occurs frequently, it is not a big problem for the motor life, so the predetermined number of times may be large.
  • the lock stop is the motor life. Therefore, it is preferable to reduce the predetermined number of times.
  • the sensor 32 has been described as including two sensors 32A and 32B. It has been described that this is for detecting the normal rotation and the reverse rotation of the permanent magnet rotor 31 by the sensors 32A and 32B.
  • the phase of the voltage applied to the motor unit 18 and the phase of the output PA of the sensor 32A are shifted by 180 degrees between normal rotation and reverse rotation, and this can be used to detect reverse rotation.
  • One sensor may be used.
  • weighting may be performed for each of the three abnormalities of lock stop, excessive or insufficient rotation speed, and reverse rotation. That is, in the flowchart of FIG. 11, the lock stop weight is “2”, and the rotation speed excess / deficiency and reverse rotation weights are “1”. According to this, when the lock stop occurs once, the control unit 19A increases the abnormality count of the counter 41 by two. On the other hand, regarding the occurrence of excessive or insufficient rotation speeds and reverse rotation, the control unit 19A increases the abnormal number count of the counter 41 by one when they occur once.
  • the control unit 19A causes the lock stop to occur. Is capable of stopping the operation by performing an abnormal output with a smaller number of occurrences compared to when the rotational speed is excessive or insufficient or when reverse rotation occurs.
  • step S3A the weight of the lock stop in the high-speed drive
  • step S2A the weight of the lock stop in the low-speed drive
  • the control unit 19A only detects the lock stop at the initial stage of the start-up operation, and detects all of the lock stop, excessive or insufficient rotational speed, and reverse rotation at the later stage of the start-up operation. It is carried out. In this way, the control unit 19A can reduce the probability of erroneous detection by setting the abnormality type required in each step. That is, during low-speed driving or high-speed driving, the single-phase AC synchronous motor 1A is driven as a brushless motor. In such a case, since the rotation speed changes from moment to moment, it is not necessary to detect excessive or insufficient rotation speed.
  • the control unit 19A can eliminate the probability of erroneous detection due to noise or the like.
  • the three steps S2, S3, S4 and the three steps S2A, S3A, S4A that are the start-up operation may be performed in only two of them. Further, power saving driving may not be performed.
  • the rectification bridge circuit 10 and the smoothing filter circuit 11 are used.
  • other conversion means such as an AC-DC converter may be employed.
  • the switching between the start operation and the synchronous operation is performed by the control units 19 and 19A, but an operation changeover switch as in Patent Document 1 may be employed.
  • a plurality of modes such as a normal operation mode, a maintenance mode, and a laboratory mode may be provided.
  • the normal operation mode in addition to the control procedure described in FIG. 9, the user may be able to manually set the motor synchronization speed and the like.
  • the maintenance mode for example, the maintenance person can access the CPU of the control unit 19A, and various control contents or setting values can be changed.
  • an abnormality history such as occurrence of an abnormality of the single-phase AC power supply 2, a lock stop of the motor unit 18, an insufficient rotation speed or a reverse rotation, and the number of occurrences is held in the control unit 19 ⁇ / b> A.
  • the control unit 19A may record the above-described abnormality history in a portable storage medium such as an SD (Secure Digital) card or a USB (Universal Serial Bus) memory.
  • the user can take out the portable storage medium from the control unit 19A, insert the portable storage medium into an external personal computer device or the like, and take the abnormality history into the personal computer device.
  • the DC power supply 15 has been described as outputting a voltage of 14.2 V, it can be appropriately set within a range of 10 V to 20 V, for example. Even if the voltage value is other than that, the voltage value of the DC power supply 15 can be appropriately set according to the standards of the starting switch elements 21 to 24 and other components.
  • the DC power supply 16 has been described as outputting a voltage of 5 V, the voltage value of the DC power supply 16 is the same as that of the components of the control units 19 and 19A and the sensor power switch 17 even if the voltage value is other than that. It can be set as appropriate according to the standard.
  • the activation switch elements 21 to 24 are configured by FETs and diodes, but instead of FETs, other members such as transistors or IGBTs (Insulated Gate Bipolar Transistors) or others These elements may be used.
  • the synchronous operation circuit 13 is configured by the triacs tr1 and tr2, other members such as relays or thyristors or other elements may be used instead of the triacs tr1 and tr2.
  • SYMBOLS 1,1A Single phase alternating current synchronous motor, 2 ... Single phase alternating current power supply, 12 ... H bridge circuit (a part of circuit for start-up operation), 13 ... Synchronous operation circuit (a part of circuit for synchronous operation), 19, 19A ... Control part (part of start-up operation circuit, part of synchronous operation circuit, control means), 21 to 24 ... start-up switching element (start-up switching means), 25 ... FET drive circuit (start-up operation circuit (Part, part of control means), 30 ... motor coil, 31 ... permanent magnet rotor, 32A, 32B ... sensor, 41 ... counter (part of control means), 42 ... timer (part of control means)

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Motor And Converter Starters (AREA)

Abstract

La présente invention a trait à un moteur spécial, tel que celui mentionné dans le document 1 du brevet, qui est davantage amélioré en vue d'augmenter son efficacité d'utilisation ou sa vitesse de fonctionnement. La présente invention a trait à un moteur synchrone à courant alternatif monophasé (1) qui met en œuvre une commande et permettant à une unité de commande (19) d'être en mesure de détecter au moins un événement parmi une pluralité d'événements comprenant un arrêt de verrouillage, un excès ou une insuffisance de la vitesse de rotation et une rotation inversée, et à un compteur (41) de l'unité de commande (19) de compter le nombre d'événements détectés, et permettant à l'opération de démarrage d'être reprise lorsque le décompte n'est pas supérieur à une pluralité de fois prescrite et d'être arrêtée lorsque le décompte excède la pluralité de fois prescrites.
PCT/JP2011/050733 2010-01-19 2011-01-18 Moteur synchrone à courant alternatif monophasé et procédé de commande associé WO2011090021A1 (fr)

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JP2020058200A (ja) * 2018-10-04 2020-04-09 ミネベアミツミ株式会社 モータ駆動制御装置およびモータ駆動制御方法
JP2020193942A (ja) * 2019-05-30 2020-12-03 日本電産株式会社 回転位置検出装置、回転位置検出方法、及び回転位置検出プログラム

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001251877A (ja) * 1999-12-27 2001-09-14 Mitsubishi Electric Corp 同期モータおよび同期モータの起動方法
JP4030571B1 (ja) * 2006-10-26 2008-01-09 有限会社ケイ・アールアンドデイ 単相交流同期モータ
JP2008079483A (ja) * 2006-09-25 2008-04-03 Rohm Co Ltd モータ駆動回路、駆動装置、ならびに電子機器
JP2009225590A (ja) * 2008-03-17 2009-10-01 Toyota Motor Corp 電動機制御装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001251877A (ja) * 1999-12-27 2001-09-14 Mitsubishi Electric Corp 同期モータおよび同期モータの起動方法
JP2008079483A (ja) * 2006-09-25 2008-04-03 Rohm Co Ltd モータ駆動回路、駆動装置、ならびに電子機器
JP4030571B1 (ja) * 2006-10-26 2008-01-09 有限会社ケイ・アールアンドデイ 単相交流同期モータ
JP2009225590A (ja) * 2008-03-17 2009-10-01 Toyota Motor Corp 電動機制御装置

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