JP5181570B2 - Motor drive device, integrated circuit device, and motor device - Google Patents

Description

  The present invention relates to a motor driving apparatus suitable for driving a brushless DC motor used in information equipment such as an air conditioner, a water heater equipped with a combustion fan motor, an air purifier, a copying machine, and a printer. In particular, the present invention relates to a motor drive device that can set an advance amount and has a function of protecting a device from an overvoltage caused by a regeneration phenomenon that occurs during motor speed control. Furthermore, the present invention relates to an integrated circuit device including such a motor driving device, and a motor device in which such a motor driving device or an integrated circuit device is built in or integrated with a motor.

  For example, brushless DC motors are used for various drive motors used in information devices such as copiers and printers, taking advantage of advantages such as long life, high reliability, and ease of speed control. There are many cases. Furthermore, in recent years, there has been an increasing demand for driving motors with lower torque ripple, lower vibration and lower noise. For this reason, a sine wave drive system in which the motor drive winding is driven by a pulse width modulated sinusoidal drive waveform is becoming common as a drive technique that meets this requirement.

  By the way, in a brushless DC motor capable of such speed control, when rotation control is performed by pulse width control using a power supply voltage, the torque generation efficiency changes depending on the timing of switching the current flowing through the drive winding of the motor. In addition, the loudness caused by the resonance between the motor and its storage case also changes. For this reason, conventionally, in such an air conditioner that drives a blower fan with a motor, when decelerating, that is, when the amount of air flow is reduced, the noise is low, and when increasing, that is, when the amount of air flow is increased, high efficiency, that is, A technique has been proposed in which high torque torque and low noise rotation are controlled in accordance with the rotational speed such as high speed and low speed by operating at high torque (for example, see Patent Document 1). .

  Such a conventional air conditioner calculates the rotational speed of the mover and the amount of change thereof, sets the advance amount for advance control for advancing the delay angle in accordance with the rotational speed, and sets the rotational speed. By smoothly changing the correction value according to the amount of change, the advance amount is corrected, the advance control is performed according to the corrected advance amount, and the current switching timing of the switching element that drives the drive winding is adjusted. It is configured to control.

  In addition, in a motor capable of such speed control, for example, when the motor is decelerated so that the speed decreases from an operation state at a constant speed, the motor acts as a generator and originally supplies power to the motor. It is known that a so-called regenerative phenomenon occurs in which a motor supplies power to a power supply device or a drive circuit.

  Such a regeneration phenomenon is caused by the following operation. That is, for example, in a drive device that drives a motor using an inverter, when a deceleration command is issued to reduce the speed, the drive voltage that drives the drive winding from the inverter also decreases and operates to decelerate the motor. To do. At this time, if the average value of the drive voltage is smaller than the induced voltage due to the drive winding of the motor, a period in which a current flows from the drive winding to the DC power source via the switch element of the inverter occurs. In other words, in order to drive the motor originally, current must be supplied toward the induced voltage of the drive winding, but conversely, the phenomenon that current is supplied from the induced voltage continues, A so-called regenerative phenomenon occurs, in which a regenerative current flows out toward the positive power supply line via a switch element or the like. Further, since such a regenerative phenomenon occurs when the motor is decelerated, the voltage on the power source side is increased by the current flowing toward the positive power source line.

  As described above, when the driving voltage to the motor becomes lower than the induced voltage generated in the driving winding, such as when the motor is decelerated, such a regeneration phenomenon occurs. Further, when such a regenerative phenomenon occurs, the voltage on the supply power source side increases, and there is a risk of destroying the motor driving device and the device on which the motor driving device is mounted.

  In particular, such a regenerative phenomenon may occur not only when the motor is simply decelerated, but also when the current of the switching element is switched by the advance angle control as described above, for example. For this reason, conventionally, the braking force is generated by controlling the phase of the driving voltage such as the advance angle control described above to control the braking of the motor, and the phase of the driving voltage to the motor so as to suppress the DC voltage rise on the power supply side. A technique has also been proposed in which the voltage of the inverter and other circuit components is controlled to be relatively low, and the cost and reliability are improved (see, for example, Patent Document 2).

Furthermore, in a motor capable of speed control as described above, when speed control is performed over a wide range from low speed to high speed, an appropriate gain in all speed ranges can be obtained with only one set of gain constant setting circuits set by the speed feedback control system. A constant could not be set, and a wide range of variable speed control could not be performed accurately. For this reason, conventionally, a technique has been proposed in which the control gain is changed in accordance with the commanded speed, and a wide range of variable speed control is appropriately performed (see, for example, Patent Document 3).
JP 2000-69784 A JP 2001-46777 A Japanese Patent Laid-Open No. 7-222481

  However, as in Patent Document 1 described above, in the case of the configuration in which the advance value is controlled while the correction value corresponding to the change amount of the rotation speed is smoothly changed and the advance amount is sequentially corrected, Detailed advance angle control is possible while suppressing sudden changes, but in order to perform such control, advanced control processing such as rotation control by a microcomputer is required, and parts for motor control are required. There are problems such as an increase in the number of points and an increase in cost and an increase in processing load of a microcomputer of a host device having a motor. Similarly, in the case of Patent Document 2 described above, the phase value corresponding to each rotation speed is stored as a table in a memory and the rotation is controlled by an auxiliary microcomputer or the like. There were problems such as an increase in the number of parts.

  On the other hand, for example, when only the advance angle phase corresponding to the two rotation speeds of high speed and low speed is stored and the advance angle is switched according to high speed or low speed, the high speed is achieved with a simple configuration. The advance angle corresponding to the low speed and the low speed can be set, but at the time of such switching, the phase of the drive voltage to the motor changes abruptly. In this way, when the phase changes abruptly, there may be a period in which the drive voltage to the motor becomes transiently lower than the induced voltage from the drive winding, thereby causing the regeneration phenomenon as described above. May occur and the voltage on the power supply side may increase.

  The present invention has been made to solve the above-described problems, and can set an advance amount corresponding to the rotation speed with a simple configuration, and can also be used for a power supply device from an overvoltage caused by a regeneration phenomenon at the time of advance angle switching. Another object of the present invention is to provide a motor drive device, an integrated circuit device, and a motor device that can safely protect the device and the equipment.

In order to achieve the above object, a motor drive device of the present invention is a motor drive device that drives a motor having a mover and a plurality of drive windings, and uses a DC voltage supplied to a power input section as a motor. Speed of the inverter that converts the drive voltage to drive and supplies the converted drive voltage to the drive winding, and the speed command information notified from the outside and the speed detection information notified from the speed detection means for detecting the speed Based on the deviation, generates a drive control signal for adjusting the drive voltage, outputs the generated drive control signal, and the phase of the drive current flowing in the drive winding and the induced voltage generated in the drive winding An advance angle setting unit that holds a plurality of advance angle amounts for setting the relationship in a selectable manner and outputs a signal indicating the selected advance angle amount as a first phase advance angle signal; and an advance angle setting unit Output from the first In AiSusumu angle signal, when switched selection of advance amount, performing a first phase advance signal indicates advance amount per time variation suppression rate actual speed of the motor by the speed command information At the time of reaching the speed at which the first phase advance angle signal is reached, the suppression of the amount of change in the advance amount indicated by the first phase advance angle signal per time is relaxed, and the signal that has been suppressed and relaxed is output as the second phase advance angle signal. A change amount suppressing unit that generates a peak value corresponding to the drive control signal and a waveform signal having a phase corresponding to the second phase advance signal for driving the motor, and a waveform signal corresponding to the waveform signal The drive signal is generated and the inverter is driven by the drive signal, thereby adjusting the drive voltage output from the inverter and controlling the speed of the motor.

  With such a configuration, the advance amount can be set according to the rotation speed of the motor, so that efficient motor drive and noise reduction can be achieved, and when the advance amount selection is switched, the change amount suppression unit drives the motor. In order to suppress a rapid change in the amount of advance of the voltage, the amount of advance can also be changed along the change in the rotational speed, and thus, transiently induced voltage to the motor rather than the induced voltage from the drive winding. Occurrence of a period in which the drive voltage is low can be suppressed. In addition, since the change amount suppressing unit may be configured to suppress the amount of change per time of the advance amount indicated by the input first phase advance angle signal, the rotation speed or the like as in the conventional example described above. It is not necessary to store the advance value and its correction value in small increments according to the amount of change, or to execute sequential correction processing, and this can be realized with a simple configuration.

  In the motor drive device of the present invention, the speed control unit has a control gain based on a transfer function that can be selected with respect to the speed deviation. In the motor drive device, the control gain selection in the speed control unit is switched. The selection of the advance amount in the advance angle setting unit is switched.

  With such a configuration, high efficiency can be achieved by setting the advance amount according to the rotation speed, and an appropriate gain constant can be set according to the rotation speed, so that a wide range of variable speed control can be performed accurately. .

  The motor drive device of the present invention has a configuration in which the change amount suppression unit is a low-pass filter that passes the low-frequency component of the first phase advance signal.

  As described above, the change amount suppression unit may be a low-pass filter having a simple configuration, and thereby, when the selection of the advance amount is switched, the change amount of the advance amount per time can be suppressed.

  In the motor drive device of the present invention, the change amount suppression unit detects the arrival of the speed at which the speed of the speed detection information reaches the speed of the speed command information in the speed command information and the speed detection information, and indicates that the speed has been detected. A speed arrival detection unit that outputs speed arrival information is provided, and when the change amount suppression unit indicates that speed arrival is detected in the speed arrival information, a change in the amount of advancement indicated by the first phase advance signal per time It is the structure which eases suppression of quantity.

  With such a configuration, when the speed of the speed detection information reaches the speed of the speed command information, that is, when the speed becomes a stable speed, the operation is performed to speed up the setting of the advance amount corresponding to the rotation speed. For example, even when the time from the speed command to the arrival of the stable speed varies depending on the load condition of the motor, the advance angle control can be performed more accurately.

  The integrated circuit device of the present invention includes the above-described motor drive device.

  With such a configuration, the motor drive device can be reduced in size, and a motor device in which the motor drive device is built in or integrated with the motor can be easily realized.

  A motor device according to the present invention includes a motor, speed detecting means for detecting the speed of the mover of the motor, the motor driving device or the integrated circuit device described above, a power input terminal to which DC power is supplied, and command information. Is provided with a command information input terminal.

  With such a configuration, it is possible to operate the power supply simply by connecting it to the motor without considering the response to the regenerative phenomenon, so the design and control burden on the host device can be reduced and high reliability can be achieved. As a result, it is possible to achieve a motor device with improved convenience and improved convenience.

  The motor device of the present invention has a configuration in which the motor is a brushless DC motor having a mover and a three-phase drive winding and driven by a sine wave by a motor drive device or an integrated circuit device.

  With such a configuration, it is possible to realize a motor device that has low torque ripple, low noise, and low vibration due to sinusoidal driving, as well as high reliability and high efficiency, and improved convenience.

  According to the present invention, since the advance amount can be set according to the rotational speed of the motor, efficient motor drive and motor noise reduction can be achieved, and when the advance amount selection is switched, the change amount suppression unit advances. Since it is a configuration that suppresses the amount of change in angular amount per hour, it is possible to set the amount of advance according to the rotation speed with a simple configuration, and from the overvoltage caused by the regeneration phenomenon at the time of advance angle switching, the power supply device and It is possible to provide a motor driving device, an integrated circuit device, and a motor device capable of safely protecting equipment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram including a configuration of a motor device 110 including a motor drive device 100 according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the motor device 110 includes a motor 10, a speed detection unit 120 that detects the speed of the mover of the motor 10, a position detection unit 121 that detects the position of the mover of the motor 10, and the motor 10. , A power input terminal 115 as a power input unit to which DC power is supplied from an external DC power source 105, and a command information input terminal 116 to which command information is notified from an external host device 16 It has.

  The motor driving device 100 is supplied with DC power, which is a predetermined DC voltage, from the DC power source 105 via the power input terminal 115 in order to rotate the motor 10.

  The host device 16 is provided, for example, in a device on which the motor device 110 is mounted, and is configured by a microcomputer, a DSP (Digital Signal Processor), or the like. Command information for controlling the speed of the motor device 110 and the like is notified from the host device 16 to the motor device 110. In the present embodiment, as the command information, the speed command signal Sref is input to the input terminal 17 and the switching signal HL is input to the input terminal 18. The speed command signal Sref is a signal indicating speed command information for commanding the speed of the motor 10. The switching signal HL is a switching command for switching the control gain so that the speed can be controlled appropriately according to the set speed of the motor 10 by the speed command signal Sref, and for switching the advance amount so that the drive can be controlled efficiently. It is a signal indicating information. In the present embodiment, an example will be described in which the control gain and the advance amount are switched in accordance with two speeds of high speed and low speed by the switching signal HL.

  The speed detection means 120 is a means for detecting the speed of the mover of the motor 10. The speed detection unit 120 is realized by, for example, a method using an FG (Frequency Generator) function that generates a pulse output proportional to the motor rotation speed. The speed detection means 120 outputs a speed detection signal N indicating speed detection information, which is information related to the detected speed of the mover, to the motor drive device 100. Further, the position detection means 121 is a means for detecting the position of the mover of the motor 10. The position detection unit 121 is realized by, for example, a method using a Hall sensor using the Hall effect, a method using an induced voltage generated in the drive winding, or a drive winding current. The position detection unit 121 outputs a position detection signal CS indicating position detection information, which is information related to the detected position of the mover, to the motor driving device 100.

  The motor 10 includes a mover (not shown), a U-phase drive winding 11, a V-phase drive winding 13, and a W-phase drive winding 15. One end of each drive winding is supplied with drive voltages U, V and W from the motor drive device 100, respectively, and the other end of each drive winding is connected to each other at a neutral point.

  In the present embodiment, an example of a brushless DC motor in which the motor 10 is sinusoidally driven by the motor driving device 100 in the motor device 110 configured as described above will be described. Further, part or all of the functions of the motor driving device 100 are realized by one or a plurality of integrated circuit devices, and circuit elements that realize the functions of the motor driving device 100 are formed on the printed circuit board. An example in which the printed circuit board is a motor device 110 built in or integrated in the motor 10 will be given.

  Although details will be described below, the motor drive device 100 according to the present embodiment is configured so that the host device 16 switches the advance amount together with the control gain for speed control by the switching signal HL. Is characterized by having a function of slowly changing the rotation speed so as to follow the change in rotation speed. As a result, when the amount of advance is switched, the generation of a period in which the drive voltage to the motor is transiently lower than the induced voltage from the drive winding is suppressed, and the DC power supply 105 or Protects upper devices. Therefore, as shown in FIG. 1, there is no need for a circuit element for the regenerative power on the power source side of the motor device 110, and the DC power source 105 does not need to consider the regenerative power to be returned. The motor apparatus 110 can be operated only by connecting 105. Further, since the host device 16 only needs to notify the motor drive device 100 of the speed command signal Sref and the switching signal HL, the host device 16 is compared with the method in which the host device 16 executes the speed control process. Can significantly reduce the processing load.

  Next, the configuration of the motor drive device 100 in the present embodiment will be described.

  As shown in FIG. 1, the motor drive device 100 performs an arithmetic process based on the control gain on the inverter 20 that converts DC power into AC power, and the speed deviation between the speed command signal Sref and the speed detection signal N, The speed control unit 40 that outputs the drive control signal VSP generated by this arithmetic processing, and a plurality of advance amounts are held so that they can be selected, and a signal indicating the selected advance amount is a first phase advance signal. The advance angle setting unit 60 that outputs as PS1 (hereinafter simply referred to as “phase advance angle signal PS1”), and the advance angle amount indicated by the phase advance angle signal PS1 from the advance angle setting unit 60 changes. And a change amount suppression unit 50 that outputs the second phase advance signal PS2 (hereinafter simply referred to as “phase advance signal PS2”) and a drive from the speed control unit 40. According to control signal VSP A waveform generation unit 31 that generates a waveform signal WF having a phase corresponding to the peak value and the phase advance angle signal PS2, and a drive signal corresponding to the waveform signal WF generated by the waveform generation unit 31 are generated. And an inverter drive unit 30 for driving the inverter 20.

  The inverter 20 converts the DC voltage supplied from the DC power supply 105 to the power input terminal 115 to drive voltages U, V, and W having an AC waveform according to the control of the inverter drive unit 30 in order to drive the motor 10. The converted drive voltages U, V and W are supplied to the drive windings 11, 13 and 15 of the motor 10.

  The speed control unit 40 calculates a speed deviation which is a difference between the speed command signal Sref notified from the external host device 16 via the command information input terminal 116 and the speed detection signal N notified from the speed detection means 120 by calculation. calculate. The speed deviation calculated in this way corresponds to the deviation between the command speed of the motor 10 and the actual speed. Furthermore, the speed control unit 40 has a control gain based on a predetermined transfer function that can be switched by the switching signal HL. The speed control unit 40 performs arithmetic processing based on the control gain on the calculated speed deviation. The signal generated by this arithmetic processing is output as a drive control signal VSP for adjusting the drive voltage to the motor 10 and is supplied to the waveform generator 31.

  Thus, the motor drive device 100 is configured such that the control gain is switched in accordance with the switching signal HL and is set inside the speed control unit 40. By appropriately setting such a control gain, the speed of the motor 10 can be stably controlled. In addition, by enabling the control gain to be switched in this way, for example, it is possible to set a control gain suitable for each of high speed operation and low speed operation. That is, the switching signal HL corresponds to the case where the motor 10 is controlled in a relatively high speed region by setting it to the “H” level, for example, and when the control signal HL is controlled in a relatively low speed region by setting the “L” level. This is a corresponding signal. The host device 16 that controls the motor driving device 100 sets the level of the switching signal HL according to which speed region the speed command signal Sref corresponds to, and thus the motor 10 is controlled. Speed can be controlled more stably.

  The advance angle setting unit 60 generates a phase advance signal PS1 for setting an advance amount corresponding to the phase of the waveform signal WF generated by the waveform generation unit 31. By making it possible to set such an advance amount, the phase relationship between the drive current flowing in the drive winding of the motor 10 and the induced voltage generated in the drive winding can be set appropriately. For example, the drive efficiency of the motor 10 Can be increased. The advance angle setting unit 60 holds the advance angle amount suitable for each of high speed and low speed operation of the motor 10 so as to be selectable. Further, the switching signal HL from the host device 16 is also notified to the advance angle setting unit 60. The advance angle setting unit 60 selects one of the advance amounts in accordance with the notified switching signal HL, and notifies the change amount suppression unit 50 of the phase advance signal PS1 indicating the selected advance amount. As described above, the motor device 110 according to the present embodiment can switch the control gain so that the speed can be appropriately controlled by the switching signal HL, and can also switch the advance amount so that the drive can be efficiently controlled. .

  When the advance amount selection is switched in the phase advance signal PS1 output from the advance angle setting unit 60, the change amount suppressing unit 50 changes the amount of change per time of the advance amount indicated by the phase advance signal PS1. Do suppression. Furthermore, the change amount suppression unit 50 notifies the waveform generation unit 31 of the signal thus suppressed as the phase advance signal PS2. That is, for example, when the switching signal HL is instructed to switch from high speed to low speed, the amount of advancement indicated by the phase advance signal PS2 is the advance angle corresponding to the high speed by such processing of the change amount suppression unit 50. The amount gradually changes from the amount to the advance amount corresponding to the low speed so as to follow the change in the rotational speed. Although details will be described below, such processing by the change amount suppression unit 50 is performed in order to suppress the occurrence of a regeneration phenomenon when the advance amount is switched.

  The waveform generation unit 31 is a sinusoidal AC waveform having a peak value corresponding to the drive control signal VSP notified from the speed control unit 40 and a phase corresponding to the phase advance signal PS2 notified from the change amount suppression unit 50. A certain waveform signal WF is generated. That is, the waveform signal WF generated by the waveform generation unit 31 has its phase advanced by the advance amount notified by the phase advance signal PS2 with reference to the position detection time notified from the position detection signal CS. Set as phase. The amplitude is set to a peak value according to the drive control signal VSP. Such a waveform signal WF generated by the waveform generation unit 31 is notified to the inverter drive unit 30.

  The inverter drive unit 30 generates a drive signal corresponding to the notified waveform signal WF, and supplies the generated drive signal to the inverter 20. In this way, the inverter drive unit 30 adjusts the drive voltages U, V, and W output from the inverter 20 and controls the speed of the motor 10. In order to perform such processing, the inverter drive unit 30 includes a pulse width modulation unit (PWM) 32 that generates a drive signal subjected to pulse width modulation according to the waveform signal WF. The pulse width modulation unit 32 supplies the generated drive signals UH, VH, WH, UL, VL, and WL to the inverter 20.

  Next, a more detailed configuration of the motor drive device 100 will be described.

  First, in the inverter drive unit 30, the pulse width modulation unit 32 generates, for example, a triangular wave-shaped PWM (Pulse Width Modulation) carrier signal and compares the waveform signal WF with this PWM carrier signal. To modulate the pulse width. Furthermore, the pulse width modulation unit 32 generates the drive signals UH, VH, WH, UL, VL, and WL by performing pulse width modulation in this way. The drive signals UH, VH, and WH have a phase difference of 120 electrical degrees, and the drive signals UL, VL, and WL are also pulse signals having a phase difference of 120 electrical degrees. At this time, UH and UL are substantially complementary signals such that when one is on and the other is off, VH and VL and WH and WL are the same. The pulse width modulation unit 32 supplies the drive signals UH, VH, WH, UL, VL, and WL generated in this way to the inverter 20. In the inverter 20, each of such drive signals is connected to each switch element, and is turned on or off.

  Next, the inverter 20 has the positive-side switch elements 21, 23 and 25 whose one terminal is electrically connected to the positive-side power line Vp of the DC power source 105, and the one terminal is electrically connected to the negative-side power line Vn. Negative-side switch elements 22, 24, and 26 connected to each other. The other terminals of the switch element 21 and the switch element 22 are connected to each other, and a drive voltage U for driving the U-phase drive winding 11 is output from this connection portion. Similarly, the switch element 23 and the switch element 24, and the switch element 25 and the switch element 26 are similarly driven by the drive voltage V for driving the V-phase drive winding 13 and the drive voltage for driving the W-phase drive winding 15. W is output. Further, the switch elements 21, 23 and 25 on the positive side are controlled to be switched on or off by drive signals UH, VH and WH, respectively. The negative-side switch elements 22, 24 and 26 are controlled to be turned on or off by drive signals UL, VL and WL, respectively. With such a configuration, the inverter 20 generates pulsed drive voltages U, V, and W that alternately change between the positive side voltage and the negative side voltage in accordance with the drive signal, respectively. And 15.

  Each drive signal supplied to the inverter 20 is a signal that has been pulse width modulated by the waveform signal WF. For this reason, on the average value, the driving voltages U, V, and W that are sinusoidal voltages corresponding to the waveform signal WF are supplied to the driving windings 11, 13, and 15 from the principle of pulse width modulation. It will be. In this way, the motor 10 is driven by a sine wave. As in this embodiment, by driving the motor 10 in a sine wave, the motor device 110 with low torque ripple, low noise, and low vibration can be realized.

  FIG. 2 is a block diagram illustrating a specific configuration example of the advance angle setting unit 60 and the change amount suppression unit 50 of the motor drive device 100 according to the present embodiment. Next, specific configurations of the advance angle setting unit 60 and the change amount suppressing unit 50 will be described with reference to the configuration example of FIG. 2 with reference to FIG.

  In FIG. 2, the advance angle setting unit 60 holds an advance angle amount PSH corresponding to a high speed and an advance angle amount PSL corresponding to a low speed in a form as indicated by voltage levels. That is, in FIG. 2, the amount of advance is held in the state of the voltage divided by the resistor so that the voltage corresponds to each amount of advance. Further, in the advance angle setting unit 60, the voltage corresponding to the advance amount PSH and the voltage corresponding to the advance amount PSL are selected by the changeover switch Sw1 according to the switching signal HL and correspond to the selected advance amount. Is output as the phase advance signal PS1.

  2 is a low-pass filter using an RC circuit including a resistor R1 and a capacitor C1, and the low frequency component of the phase advance signal PS1 from the advance angle setting unit 60 is obtained. Let it pass. That is, by providing such a low-pass filter for the phase advance signal PS1, the phase advance signal PS1 corresponds to the advance amount PSL from the voltage corresponding to the advance amount PSH, for example, according to the switching signal HL. When changing to a voltage, the amount of change in voltage per time is suppressed, and a phase advance signal PS2 that gradually and gradually changes from a voltage corresponding to the advance amount PSH to a voltage corresponding to the advance amount PSL is generated. Will be output.

  FIG. 3 is a timing chart showing the state of the phase advance signal PS1 and the phase advance signal PS2 when the switching signal HL is switched in the motor drive device 100 of the present embodiment. 3A shows the switching signal HL, FIG. 3B shows the phase advance signal PS1, and FIG. 3C shows the phase advance signal PS2. As shown in FIG. 3, when the switching signal HL is switched to, for example, an H level indicating high speed at time t10, the phase advance signal PS1 becomes a level corresponding to the advance amount PSH accordingly, and at time t11, When the switching signal HL is switched to the L level indicating low speed, the phase advance signal PS1 becomes a level corresponding to the advance amount PSL. Further, since the phase advance signal PS2 output from the change amount suppression unit 50 is a signal obtained by low-pass filtering the phase advance signal PS1 shown in FIG. 3B, as shown in FIG. 3C. In addition, during the period T10 from the time t10, the level gradually changes from the level corresponding to the advance amount PSL to the level corresponding to the advance amount PSH, and corresponds to the advance amount PSH from the time t11 to the period T11. The level gradually changes from the adjusted level to a level corresponding to the advance amount PSL.

  In FIG. 2, the advance angle setting unit 60 holds the advance amount corresponding to the speed at the voltage level, and the change amount suppression unit 50 uses a low-pass filter including a resistor R1 and a capacitor C1. Although an example has been described that suppresses the amount of change in the advance amount per time, for example, the change amount suppression unit 50 may be a low-pass filter other than the RC filter, and the switching of the switching signal HL is possible. There may be a configuration using a voltage generator that sometimes changes from a voltage corresponding to one advance amount to a voltage corresponding to the other advance amount. Further, as the advance amount held by the advance angle setting unit 60, for example, it is stored as digital data, and the change amount suppressing unit 50 is configured to suppress the change amount of the advance amount per time with a low-pass filter constituted by a digital filter. Further, an up / down counter or the like may be used, and when the switching signal HL is switched, the data value corresponding to one advance amount is increased or decreased from the data value corresponding to the other advance amount. It may be a form that changes while countering.

  Further, since the change amount suppressing unit 50 may be configured to suppress the amount of change in the advance amount indicated by the input phase advance signal PS1 per time, the advance value is determined according to the rotational speed and the change amount. Further, there is no need to store the correction values and the correction values in small increments, and the configuration can be realized with a simple configuration as shown in FIG.

  The motor drive device 100 and the motor device 110 provided with the same in the present embodiment are configured as described above.

  With such a configuration, for example, when an acceleration command is issued so that the speed command signal Sref increases in order to increase the speed, the speed deviation of the speed control unit 40 becomes a signal having a positive value, and the drive control signal VSP is To increase. Further, as the drive control signal VSP increases, the amplitude of the sinusoidal waveform signal WF generated by the waveform generator 31 also increases. As a result, the drive voltage corresponding to the waveform signal WF for driving each drive winding also increases, and the motor 10 operates to accelerate. Further, information on the speed accelerated in this way is notified to the speed control unit 40 as a speed detection signal N. The motor driving device 100 executes such feedback loop control so that the speed command signal Sref and the speed detection signal N are equal.

  In addition, the motor drive device 100 according to the present embodiment is notified of a speed switching command by the speed command signal Sref, and when the switching speed is switching between the high speed and the low speed, the switching signal The control gain of the speed control unit 40 and the advance amount of the advance angle setting unit 60 are switched by HL. In addition, the advance amount switched in the advance angle setting unit 60 is gradually changed from an advance amount corresponding to high speed to an advance amount corresponding to low speed because the change amount is suppressed in the change amount suppressing unit 50. Then, the waveform generation unit 31 is notified of such a phase advance signal PS2 indicating the slowly changing advance amount. For this reason, when the switching signal HL is switched, the waveform generator 31 outputs the waveform signal WF whose phase gradually changes with time. The inverter 20 drives the motor 10 with a driving voltage corresponding to the waveform signal WF whose phase gradually changes. That is, when the switching signal HL is switched, the motor 10 can be driven while gradually changing the advance amount along the change in the rotational speed, so that the motor 10 is driven with the driving voltage having a suddenly changed phase. Driving can be suppressed, and thereby generation of a period in which the driving voltage to the motor is transiently lower than the induced voltage from the driving winding can be suppressed.

  Next, operations of the motor drive device 100 of the present embodiment configured as described above and the motor device 110 including the motor drive device 100 will be described.

  FIG. 4 is an operation explanatory diagram of the motor device 110 including the motor driving device 100 according to the present embodiment. FIG. 5 is a diagram illustrating a state in which the phase of the sinusoidal voltage applied to the drive winding is controlled by the advance amount in the motor device 110 of the present embodiment.

  First, a basic operation for driving the motor drive device 100 and the motor device 110 in a sine wave will be described with reference to FIG. In the following, the operation for the U-phase drive winding 11 connected to the drive voltage U of the inverter 20 will be mainly described.

  In FIG. 4, a sinusoidal waveform signal WF is a signal generated by the waveform generation unit 31, and a triangular waveform signal CY is a PWM carrier signal generated inside the pulse width modulation unit 32. Normally, the carrier signal CY is set to a frequency sufficiently higher than the electrical angular period due to the rotation of the motor 10, but in FIG. 4, it is shown at a relatively low frequency for convenience of explanation. The waveform signal WF is compared with the carrier signal CY by the pulse width modulation unit 32. According to the comparison result, the switch elements 21 and 22 of the inverter 20 are turned on and off in a complementary manner. As a result, a drive voltage U as shown in FIG. 4 is output from the inverter 20 and applied to the drive winding 11. As a result, a U-phase drive current Iu flows through the drive winding 11 and an induced voltage Uemf as shown in FIG. 4 is generated. As described above, the driving voltage U is a sine wave voltage corresponding to the waveform signal WF from the principle of pulse width modulation on average. Accordingly, a sinusoidal voltage similar to the U-phase waveform signal WF is equivalently applied to the drive winding 11.

  Similarly to the U-phase drive winding 11, the V-phase drive winding 13 and the W-phase drive winding 15 are also sinusoidal by the drive voltage V and the drive voltage W from the inverter 20, respectively. A voltage is applied equivalently.

  Here, the drive voltages U, V, and W applied to the drive windings 11, 13, and 15 have a phase difference of 120 electrical degrees. This is because, for the V-phase drive winding 13, according to the comparison result between the U-phase waveform signal WF and the V-phase waveform signal WF having a phase difference of 120 degrees in electrical angle with the carrier signal CY. This is realized by turning on and off the switch elements 23 and 24. For the W-phase drive winding 15, the comparison result between the U-phase and V-phase waveform signal WF and the W-phase waveform signal WF having a phase difference of 120 degrees from each other and the carrier signal CY. Accordingly, the switching elements 25 and 26 are turned on and off.

  As described above, a sinusoidal voltage is equivalently applied to each of the drive windings 11, 13, and 15, and each of the drive windings 11, 13, and 15 is driven by a sinusoidal alternating current.

  Next, an operation in which the motor 10 is driven by a driving voltage corresponding to the waveform signal WF will be described with reference to FIG.

  First, the drive control signal VSP output from the speed control unit 40 is input to the waveform generation unit 31. The peak value of the sinusoidal waveform signal WF generated by the waveform generation unit 31 is adjusted according to the drive control signal VSP. The pulse width modulation unit 32 performs pulse width modulation using the waveform signal WF whose peak value is adjusted by the drive control signal VSP. Thus, a sinusoidal drive voltage whose peak value is controlled by the drive control signal VSP is equivalently applied to the U-phase drive winding 11. The drive control signal VSP of the speed control unit 40 has a predetermined control gain with respect to the difference between the speed command signal Sref notified from the host device 16 via the input terminal 17 and the speed detection signal N of the motor 10. Based on the filter processing based on.

  With such a configuration, when the speed detection signal N is higher than the speed command signal Sref, the drive control signal VSP is decreased and the drive voltage of the drive winding is decreased. Thereby, the motor 10 is decelerated and approaches the speed indicated by the speed command signal Sref. Conversely, when the speed detection signal N is lower than the speed command signal Sref, the drive control signal VSP is increased to increase the drive voltage of the drive winding. As a result, the motor 10 is accelerated and approaches the speed indicated by the speed command signal Sref. By performing such an operation, the speed command signal Sref and the speed detection signal N are controlled to be substantially the same. In this way, the host device 16 can freely operate the speed of the motor 10 by notifying the motor drive device 100 of the speed command signal Sref as a speed command.

  Further, as described above, when the speed control unit 40 outputs the drive control signal VSP, the motor drive device 100 is controlled by the switching signal HL in order to stably control the speed of the motor 10. The optimal control gain can be set internally. That is, an appropriate control gain for stably performing speed control varies depending on the control speed of the motor 10. For this reason, it is possible to stabilize the motor 10 by enabling switching of such control gains. Specifically, depending on whether the speed command by the speed command signal Sref from the host device 16 is a high speed region or a low speed region, the control gain is appropriately set in each speed region. The host device 16 notifies the motor drive device 100 of the switching signal HL. The motor driving device 100 receives this at the speed control unit 40, and the speed control unit 40 switches and sets the control gain according to the switching signal HL.

  Next, the phase control operation by the advance angle setting unit 60 and the change amount suppressing unit 50 will be described with reference to FIG.

  As described above, the phase of the sinusoidal voltage applied to each of the drive windings 11, 13, and 15 is controlled in accordance with the advance amount selected by the advance angle setting unit 60.

  The advance amount selected by the advance angle setting unit 60 is notified to the waveform generation unit 31 as the phase advance signal PS2 via the change amount suppression unit 50. First, the waveform generation unit 31 generates a waveform signal WF ′ according to the position of the mover of the motor 10 using the phase based on the position detection signal CS as a reference phase timing. Since the position detection signal CS is configured to detect the magnetic pole position of the magnet incorporated in the mover, for example, the phase relationship with the induced voltage generated by the drive winding is uniquely determined. In other words, the reference phase timing can be set to the zero cross timing of the induced voltage Uemf generated in the drive winding 11 as shown in FIG. The waveform generation unit 31 advances the phase of the waveform signal WF ′ generated according to the reference phase timing in accordance with the advance amount ps as shown in FIG. 5, and the waveform signal WF whose phase has been advanced in this way. Output to the pulse width modulator 32. As a result, a sinusoidal drive voltage U whose phase can be controlled by the advance amount ps can be applied to the U-phase drive winding 11.

  Further, since the drive winding has an inductance component, a phase delay as shown in FIG. 5 of the drive current Iu with respect to the average value of the drive voltage U (corresponding to the waveform signal WF) occurs. With respect to this phase delay, the phase of the waveform signal WF is adjusted by the advance amount ps of the advance angle setting unit 60, and the phase difference between the induced voltage Uemf of the drive winding and the drive current Iu is zero as shown in FIG. The driving efficiency for the motor 10 can be increased by advancing the phase so that The same applies to not only the U-phase drive winding 11 but also the V-phase drive winding 13 and the W-phase drive winding 15.

  In addition, as described above, the motor drive device 100 can set the advance amount corresponding to the rotation speed by the advance signal setting unit 60 using the switching signal HL. The advance amount for making the phases of the induced voltage Uemf and the drive current Iu coincide with the rotational speed of the motor 10. Therefore, the advance angle setting unit 60 holds the advance angle amount PSH corresponding to the high speed and the advance angle amount PSL corresponding to the low speed, as described with reference to FIG. By making it possible to switch the advance amount according to such speed by the switching signal HL, it is possible to achieve optimum driving efficiency according to the rotational speed. Specifically, the advance amount is appropriately set in each speed region according to whether the speed command by the speed command signal Sref from the host device 16 is a high speed region or a low speed region. The upper unit 16 notifies the motor drive device 100 of the switching signal HL. The motor driving apparatus 100 receives this at the advance angle setting unit 60, and the advance angle setting unit 60 switches and sets the advance amount in accordance with the switching signal HL.

  Since the motor drive device 100 and the motor device 110 including the motor drive device 100 according to the present embodiment can select the control gain and the advance angle amount according to the rotation speed by the switching signal HL, the advance angle amount according to the rotation speed can be selected. In addition to achieving high efficiency by setting, an appropriate gain constant can be set according to the rotational speed, and a wide range of variable speed control can be performed accurately.

  By the way, if the advance amount is rapidly switched together with the speed change command by the speed command signal Sref, the phase relationship between the waveform signal WF and the induced voltage Uemf as shown in FIG. 5 is greatly disturbed. Further, as described above, when the average value of the drive voltage corresponding to the waveform signal WF becomes smaller than the induced voltage Uemf, a regeneration phenomenon occurs. That is, if the advance amount is suddenly switched along with the speed change, the phase relationship between the average value of the drive voltage and the induced voltage Uemf is disturbed, and the drive voltage becomes transiently higher than the induced voltage Uemf until the speed stabilizes. There was a possibility that a regenerative phenomenon would occur due to a low period. In order to suppress the regenerative phenomenon at the time of switching the advance amount, a change amount suppression unit 50 is provided in the motor drive device 100.

  That is, when a speed change command is notified by the speed command signal Sref, the rotation speed of the motor 10 gradually changes to a speed corresponding to the speed command signal Sref in the motor device 110, as shown in FIG. The period of the induced voltage Uemf also changes according to this speed change. On the other hand, since the change amount suppression unit 50 suppresses the change amount of the advance amount per time, the advance amount indicated by the phase advance signal PS2 from the change amount suppression unit 50 also changes gradually. For this reason, even if the advance amount of the advance angle setting unit 60 is switched together with the speed change command by the speed command signal Sref, the advance amount gradually changes along with the change of the rotational speed, as shown in FIG. Disturbance in the phase relationship between the simple waveform signal WF and the induced voltage Uemf can be suppressed. Moreover, since generation | occurrence | production of the period when a drive voltage becomes lower than induced voltage Uemf by this can be suppressed, generation | occurrence | production of a regeneration phenomenon can also be suppressed.

(Embodiment 2)
FIG. 6 is a block diagram showing change amount suppression unit 250 and its peripheral blocks of motor drive device 100 according to Embodiment 2 of the present invention.

  In comparison with the first embodiment shown in FIG. 1, the motor drive device 100 in the second embodiment replaces the change amount suppressing unit 50 in the first embodiment with a speed arrival detection unit 251 as shown in FIG. 6. The change amount suppression unit 250 having the above. The motor drive device 100 and the motor device 110 including the motor drive device 100 according to the second embodiment are configured as described above, and at the time when the actual speed of the motor 10 becomes the speed based on the speed command signal Sref, It is characterized by a configuration that alleviates the suppression of the amount of change. The components other than the change amount suppressing unit 250 are the same as those in the first embodiment, and detailed description thereof is omitted.

  The change amount suppression unit 250 can switch the filter characteristics in response to an instruction from the speed arrival detection unit 251 and the speed arrival detection unit 251 that detect that the actual speed of the motor 10 has reached the speed based on the speed command signal Sref. And a low-pass filter.

  The speed arrival detection unit 251 is notified of a speed command signal Sref indicating speed command information from the external host device 16 via the command information input terminal 116, and a speed detection signal N indicating speed detection information from the speed detection means 120. Will be notified. The speed arrival detection unit 251 detects the speed arrival at which the speed indicated by the speed detection signal N reaches the speed indicated by the speed command signal Sref, and outputs speed arrival information indicating the detection.

  In addition, when the speed arrival information from the speed arrival detection unit 251 indicates that the speed arrival is detected, the low-pass filter of the change amount suppression unit 250 switches to a low-pass filter characteristic that reduces the time constant. FIG. 6 shows a specific example of such a low-pass filter. That is, when speed arrival is not detected in the speed arrival information, a low-pass filter using an RC circuit composed of the resistor R1 and the capacitor C1 is provided, similarly to the change amount suppression unit 50 of the first embodiment. Further, in the change amount suppression unit 250, a circuit in which the resistor R2 and the switch Sw2 are connected in series is connected in parallel to the resistor R1. The switch Sw2 is controlled to be turned on / off based on the speed arrival information. With such a configuration, when it is notified that speed arrival is detected in the speed arrival information, the switch Sw2 is turned on, and the time constant of the low-pass filter by the RC circuit is reduced.

  FIG. 7 is a timing chart showing the state of the phase advance signal PS1 and the phase advance signal PS2 when the speed command signal Sref and the switching signal HL are switched in the motor drive device 100 of the present embodiment. . 7A shows the command speed indicated by the speed command signal Sref and the actual motor speed, FIG. 7B shows the switching signal HL, and FIG. 7C shows the phase advance signal PS1. FIG. 7D shows the phase advance signal PS2.

  First, as shown in FIG. 7A, when the command speed indicated by the speed command signal Sref is changed, the actual speed of the motor 10 is changed to the stable speed that is the command speed by the speed control of the motor driving device 100. Change to converge. FIG. 7A shows an example in which the time until the motor 10 reaches a stable speed is relatively short. That is, the acceleration and deceleration time until the stable speed is reached varies depending on, for example, the load attached to the motor 10. For this reason, even if it is the same motor, it may converge rapidly to a stable speed, or may converge slowly to a stable speed. FIG. 7A shows an example where the time to reach a stable speed is relatively short due to the load on the motor 10. If the time required to reach the stable speed is relatively long because of no load, the change is as shown by the broken line in FIG.

  Thus, at time t20, when the deceleration command is issued by the command speed indicated by the speed command signal Sref and the switching signal HL is switched to the L level indicating the low speed, the phase advance signal PS1 is advanced accordingly. The level corresponds to the amount PSL. Thereafter, by the speed control of the motor driving device 100, the actual speed of the motor 10 changes so as to converge to a stable speed as shown in FIG. Further, as shown in FIG. 7D, the phase advance signal PS2 output from the change amount suppression unit 250 also gradually changes from the advance amount PSH to a level corresponding to the advance amount PSL. Thus, when the rotational speed of the motor 10 or the level of the phase advance signal PS2 changes and the actual speed of the motor 10 becomes the command speed at time t21, the speed arrival detection unit 251 detects the arrival of speed. As a result, the switch Sw2 of the variation suppression unit 250 is turned on, and the time constant of the low-pass filter by the RC circuit is reduced. For this reason, as shown in FIG. 7D, in the period from time t21 to time t22, the level of the phase advance signal PS2 converges to a level corresponding to the advance amount PSL.

  On the other hand, in the case of the configuration as in the first embodiment, even if the actual speed of the motor 10 becomes a stable speed at time t21, for example, the level of the phase advance signal PS2 changes gradually until time t23. become. For this reason, a period in which the amount of advance angle that is not optimal with respect to the rotational speed of the motor 10 is set, such as the period from time t21 to time t22. Further, since the level of the phase advance signal PS2 is changed from time t20 to time t22, the setting time for the optimal advance amount is also increased.

  On the other hand, by adopting a configuration such as the change amount suppressing unit 250 of the present embodiment, the setting time for the optimum advance angle amount is shortened, and in a period in which the rotation speed of the motor 10 changes. Also, the change in the advance amount can be roughly followed. For this reason, even if the advance amount of the advance angle setting unit 60 is switched together with the speed change command by the speed command signal Sref, the advance amount gradually changes along with the change of the rotational speed, as shown in FIG. Disturbance in the phase relationship between the simple waveform signal WF and the induced voltage Uemf can be suppressed. Moreover, since generation | occurrence | production of the period when a drive voltage becomes lower than induced voltage Uemf by this can be suppressed, generation | occurrence | production of a regeneration phenomenon can also be suppressed.

  As described above, the motor drive device 100 according to the first and second embodiments has the phase when the selection of the advance amount is switched in the phase advance signal PS1 output from the advance setting unit 60. Since the change amount suppression unit 50 or the change amount suppression unit 250 that suppresses the change amount per time of the advance amount indicated by the advance angle signal PS1 and outputs it as the phase advance angle signal PS2, the rotation of the motor is provided. The motor can be driven efficiently and the noise can be reduced according to the speed, and when the advance amount selection is switched, the change amount suppression unit 50 or the change amount suppression unit 250 causes a rapid change in the advance amount of the drive voltage to the motor. Can be suppressed, and the amount of advance can be changed so as to follow the change in the rotational speed. For this reason, when the selection of the advance amount is switched together with the speed change, it is possible to suppress the occurrence of a period in which the drive voltage to the motor is transiently lower than the induced voltage from the drive winding. Further, since the change amount suppressing unit 50 or the change amount suppressing unit 250 may be configured to suppress the amount of change per time of the advance amount indicated by the input phase advance signal PS1, the rotational speed and the change amount thereof may be sufficient. Accordingly, there is no need for a configuration in which the advance value and its correction value are memorized in small increments, and this can be realized with a simple configuration. Therefore, according to the motor drive device 100 of the present invention, the advance amount according to the rotation speed can be set with a simple configuration, and the power supply device and equipment can be safely protected from the overvoltage caused by the regeneration phenomenon at the time of advance angle switching. It becomes possible to do.

  Further, by incorporating or integrating the sine wave drive motor drive device 100 as described above into the motor device 110, the host device on which the sine wave drive is mounted is a sine wave drive that realizes low torque ripple, low noise, and low vibration. This makes it possible to construct a motor easily and safely without paying attention to the regenerative phenomenon. Further, by integrating a part or all of the motor driving device 100 as an integrated circuit device, the motor driving device 100 can be reduced in size, so that it can be incorporated or integrated more easily. As a result, the design and control burden of the host device can be reduced, and the use of a sine wave drive having excellent performance can be promoted and promoted.

  In the above description, the configuration for preventing the regenerative phenomenon at the time of switching the advance amount has been mainly described. However, as described above, the regenerative phenomenon is also caused by the deceleration operation. For this reason, the protection function from the overvoltage resulting from a regeneration phenomenon can be improved more by combining the suppression function etc. of the regeneration phenomenon which arises by such deceleration operation | movement with this invention.

  In the above description, an example in which two control gains of high speed and low speed and an advance amount are selected by the switching signal HL has been described. However, the present invention is not limited to two, and a plurality of control gains and The configuration may be such that any one of the control gain and the advance amount is selected from a plurality of advance amounts.

  According to the motor drive device and motor device of the present invention, the host device on which the motor drive device is mounted easily cares for the regenerative phenomenon of a sine wave drive motor that realizes low torque ripple, low noise, and low vibration. Can be built safely. For this reason, water heaters, air purifiers, refrigerators, washing machines, etc. equipped with fan motors and combustion fan motors for air conditioning equipment that require low vibration and low noise by sine wave drive without paying attention to the regeneration phenomenon It is suitable for a motor device and its driving device used for home appliances, printers, copiers, scanners, fax machines, or composite devices thereof, and information devices such as hard disks and optical media devices.

1 is a block diagram including a configuration of a motor device including a motor drive device according to Embodiment 1 of the present invention. The block diagram which shows the specific structural example of the advance angle setting part and change amount suppression part of the motor drive device Timing chart showing states of phase advance signal PS1 and phase advance signal PS2 in the motor drive device Operation explanatory diagram of a motor device provided with the motor drive device In the same motor device, a diagram showing how the phase of a sinusoidal voltage applied to the drive winding is controlled by the advance amount. The block diagram which showed the variation | change_quantity suppression part of the motor drive device in Embodiment 2 of this invention, and its periphery block Timing chart showing states of phase advance signal PS1 and phase advance signal PS2 in the motor drive device

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Motor 11, 13, 15 Drive winding 16 High rank unit 17, 18 Input terminal 20 Inverter 21, 22, 23, 24, 25, 26 Switch element 30 Inverter drive part 31 Waveform generation part 32 Pulse width modulation part (PWM)
40 Speed control unit 50, 250 Change amount suppression unit 60 Advance angle setting unit 100 Motor drive device 105 DC power supply 110 Motor device 115 Power supply input terminal 116 Command information input terminal 120 Speed detection unit 121 Position detection unit 251 Speed arrival detection unit

Claims (7)

A motor drive device for driving a motor having a mover and a plurality of drive windings,
An inverter that converts a DC voltage supplied to a power input unit into a drive voltage for driving the motor, and supplies the converted drive voltage to the drive winding;
Based on the speed deviation between the speed command information notified from the outside and the speed detection information notified from the speed detecting means for detecting the speed, a drive control signal for adjusting the drive voltage is generated, and the generated drive control A speed control unit for outputting a signal;
A plurality of advance amounts for setting the phase relationship between the drive current flowing in the drive winding and the induced voltage generated in the drive winding are held in a selectable manner, and the selected advance amount is indicated. An advance angle setting unit for outputting the signal as a first phase advance angle signal;
When the advance amount selection is switched in the first phase advance signal output from the advance angle setting unit, the amount of change per time of the advance amount indicated by the first phase advance signal is suppressed. When the actual speed of the motor reaches the speed according to the speed command information, the suppression of the amount of change per hour of the advance amount indicated by the first phase advance signal is reduced and suppressed. And a change amount suppression unit that outputs a signal that has been relaxed as a second phase advance signal,
A waveform generation unit for generating a peak value corresponding to the drive control signal and a phase waveform signal corresponding to the second phase advance signal for driving the motor;
An inverter drive unit that generates a drive signal according to the waveform signal, drives the inverter by the drive signal, adjusts the drive voltage output by the inverter, and controls the speed of the motor; The motor drive device characterized by the above-mentioned. The speed control unit has a control gain based on a transfer function that can be selected for the speed deviation,
The motor drive device according to claim 1, wherein the advance angle amount selection in the advance angle setting unit is switched together with the selection of the control gain in the speed control unit. 3. The motor driving apparatus according to claim 1, wherein the change amount suppression unit is a low-pass filter that passes a low-frequency component of the first phase advance signal. The variation suppressing section, at the speed command information and the speed detection information, and detecting the speed reaches the speed of the speed detection information has reached a speed of the speed command information, the speed arrival information indicating the detection of It has a speed arrival detector to output,
The change amount suppression unit relaxes suppression of the change amount per time of the advance amount indicated by the first phase advance signal when the arrival of speed is indicated in the speed arrival information. The motor drive device according to claim 1 or 2. An integrated circuit device comprising the motor drive device according to claim 1. A motor,
Speed detecting means for detecting the speed of the mover of the motor;
A motor driving device according to any one of claims 1 to 4, or an integrated circuit device according to claim 5,
A power input terminal to which DC power is supplied;
A motor device comprising: a command information input terminal for receiving command information including speed command information. 7. The brushless DC motor according to claim 6, wherein the motor has a mover and a three-phase drive winding, and the drive winding is sinusoidally driven by the motor drive device or the integrated circuit device. The motor apparatus as described.

Images