JP2017158380A - Motor control device, and drum type washing machine or drum type washing dryer machine using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor control device capable of efficiently driving a brushless motor from a low speed to a high speed while providing a detection position correction function of a position detector for a high precision brushless motor as sure data at an optimum place, and a drum type washing machine or drum type washing dryer machine using the same.SOLUTION: A control circuit 1 for performing inverter control on a brushless-motor motor unit 2 rotates three-phase AC current flowing through plural windings of the brushless-motor motor unit 2 more slowly during manufacturing than that during operation, detects a direction of the three-phase AC current when an output signal of a position detector 3 varies, stores the detection value of the direction of the three-phase AC current into storing means 5 contained in a brushless motor 20 as a correction value of the position detection signal, and controls the brushless-motor motor unit 2 by using the stored correction value when operating as a product, whereby a detection position correction function with high accuracy is provided, and the brushless-motor motor unit 2 can be efficiently driven from a low speed to a high speed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a motor control device that controls a brushless motor and a drum-type washing machine or a drum-type washing / drying machine using the same.

  2. Description of the Related Art Conventionally, in a motor control device used in a drum type washing machine or a drum type washing / drying machine, generally, a brushless motor inverter equipped with a position detector is used to efficiently control a brushless motor from a low speed to a high speed. Control is often used (for example, see Patent Document 1). FIG. 10 shows a motor control device for driving a general brushless motor, and its configuration will be described below.

  The motor control device includes a brushless motor 12, a position detector 3 (3 a, 3 b, 3 c) that detects the rotor position of the brushless motor 12, an inverter 11 that drives the brushless motor 12, and the position detector 3. It has a control circuit 64 and a drive circuit 62 for controlling the inverter 11 that drives the brushless motor 12 using signals. The brushless motor 12 has the position detector 3 incorporated therein. For example, a Hall IC that outputs the direction of the magnetic flux of the rotor magnet as a signal is generally used. The inverter 11 is supplied with a voltage obtained by rectifying the AC power supply 53 with the diode bridge 55 and smoothing with the capacitors 56a and 56b. The inverter 11 includes six switching elements SWU, SWV, SWW, SWX, SWY, SWZ and six diodes 60a, 60b, 60c, 61a, 61b, 61c.

  The control of the brushless motor 12 uses the signal of the position detector 3 (3a, 3b, 3c) built in the brushless motor 12, and the control circuit 64 detects the speed and position of the rotor of the brushless motor 12 from the signal. Then, a PWM signal for driving the six switching elements of the inverter 11 is generated, and the drive circuit 62 amplifies and converts the voltage to a voltage that can drive the switching elements SWU, SWV, SWW, SWX, SWY, SWZ. The brushless motor 12 is controlled by driving.

  By the way, when trying to detect the magnetic flux of the rotor of the brushless motor 12 using, for example, a Hall IC in the position detector 3 (3a, 3b, 3c) built in the brushless motor 12, the accuracy of mounting the Hall IC, For example, the position detector 3 is affected by the positional accuracy of mounting on a printed wiring board, the positional accuracy of fixing the printed wiring board to the brushless motor 12, the mechanical accuracy of the rotor of the brushless motor 12, the accuracy of magnetization, etc. The output signal has a phase shift with respect to the position of the rotor to be detected originally, that is, the position of the signal of the position detector 3 which should be relative to the induced voltage of the rotor. This deviation can often be as great as 10 degrees in electrical angle.

  The deviation of the signal of the position detector 3, that is, the detected value of the position of the rotor of the brushless motor 12, causes a reduction in efficiency when the brushless motor 12 is driven, and increases the heat generation of the brushless motor 12. In addition, this tendency increases as the rotation speed of the brushless motor 12 increases. In particular, the induced voltage of the brushless motor 12 cannot be ignored with respect to the power supply voltage, and becomes noticeable when the advance angle control is performed.

In order to prevent this, a sine wave voltage having a preset voltage and frequency is supplied to the brushless motor 12, and the phase of the sine wave voltage generated when the open loop driving is performed and the output signal of the position detector 3. The amount of deviation from the phase is detected and stored in the storage means 5 and feedback control based on the position signal output from the position detector 3 is performed to drive the brushless motor 12 based on the amount of displacement. A proposal has been made to make it less susceptible to the phase shift of the signal from the position detector 3 by correcting the sinusoidal voltage supplied to the brushless motor 12.

  In the technique described in Patent Document 1, the storage means 5 is detected by detecting the amount of deviation between the phase of the sinusoidal voltage generated when the brushless motor 12 is driven in an open loop and the phase of the output signal of the position detector 3. Therefore, the brushless motor 12 cannot be driven efficiently with respect to variations due to the amount of laundry, and in order to solve this problem, the position detector 3 with high accuracy is used. There has also been proposed a motor control device which has a detection position correction function and corrects a position detection signal from the position detector 3 in a state where the detection position correction function is previously rotated more slowly than during actual driving (for example, Patent Documents). 2).

  However, with these correspondences, for example, the brushless motor 12 is mounted on a drum-type washing machine, and the detected value is attached to the control circuit 64 when the product detects a shift in the signal of the position detector 3. When the value is corrected and controlled when the brushless motor 12 is driven and stored in the storage means 5, the position detector 3 is a part with the brushless motor 12 built in, so the output signal is unique. This data is only relevant to the built-in brushless motor.

JP 2002-325480 A JP2015-50792A

  However, in such a conventional motor control device, even if the displacement of the position detector 3 built in the brushless motor 12 is stored in the storage means 5, it is replaced due to incomplete mounting of the brushless motor 12 itself in the production process. In the storage means 5 attached to the control circuit 64, the newly installed brushless motor 12 has no meaning in the memory means 5 attached to the control circuit 64 by replacing the brushless motor 12 or its surrounding parts in the market. Therefore, the measurement of the correction value newly performed at the time of manufacture must be performed again in the production process, the market, or the user's home.

  In addition, it cannot be said that there is no problem in the market with respect to the control circuit 64. If the storage means 5 is attached to the control circuit 64, the control circuit 64 can be repaired or replaced. Even when the brushless motor 12 is normal and there is no abnormality, the variation of the position detector 3 built in the brushless motor 12 is measured again, the correction value is detected, and the control circuit 64 is attached again. Is stored in the storage means 5.

  Here, forgetting this operation, the correction value of the attached brushless motor 12 is +10 degrees, and the correction value stored in the storage means 5 attached to the new control circuit 64 is the median value. If this happens, there will be a difference of +10 degrees, which may result in loss of control, a lot of reactive current flowing, abnormal heat generation in other circuit parts, and protection devices working, which may result in inoperability. .

Also, the load varies greatly depending on the amount of laundry, and when used in a drum-type washing machine or drum-type washing / drying machine in which the brushless motor 12 is driven at a low speed during washing or drying and is driven at a high speed during dehydration, it is efficiently brushless. The motor 12 could not be driven, and there was a problem that it was difficult to realize an efficient drum-type washing machine or drum-type washing / drying machine.

  The present invention solves the above-described conventional problems. In a brushless motor control device, a highly accurate detection position correction function of a position detector of a brushless motor is provided as reliable data at an optimum location, so that low speed to high speed can be obtained. It is an object of the present invention to provide a motor control device that efficiently drives a brushless motor and a drum-type washing machine or a drum-type washing / drying machine using the same.

  In order to achieve the above object, the present invention provides a brushless motor, a position detector that detects the position of a rotor built in the brushless motor, an inverter that drives the brushless motor, and the inverter that flows through the brushless motor. A current detector that detects a current; and a control circuit that controls the inverter that drives the brushless motor using an output signal of the position detector and the current detector, and the control circuit includes the brushless motor. The position detection is performed by applying a three-phase alternating current to the plurality of windings of the winding and applying a three-phase alternating current, and rotating the three-phase alternating current applied to the plurality of windings of the brushless motor more slowly than in operation. The direction of the three-phase alternating current when the output signal of the detector changes is detected, and the detected value of the direction of the three-phase alternating current is predetermined. If it is outside the range, an abnormality is detected and a position detection correction abnormality signal is output.If the detected value of the direction of the three-phase alternating current is within a predetermined range, the direction of the three-phase alternating current is Detection values are output, and these output values are stored as correction values for the position detection signal of the brushless motor in a first predetermined area of the storage means built in the brushless motor. When the brushless motor is in operation, the brushless motor And a motor control device for controlling the brushless motor using an output signal of the position detector built in the sensor and a correction value of the position detection signal stored in the first predetermined area of the storage means, and the same A drum type washing machine or a drum type washing and drying machine.

  As a result, even when the position detector signal with respect to the induced voltage has a deviation from the desired position, the deviation amount can be accurately corrected, and the correction value is attached to the brushless motor. If the position detector signal is significantly deviated from the desired position, it is possible to take measures such as replacing the brushless motor by detecting it.

  Further, since data that needs to be stored in the operation of the product can be stored in a region other than the predetermined area of the storage means, a low-cost and wasteful circuit configuration is realized even on the product side.

  The motor control device of the present invention and the drum-type washing machine or drum-type washing / drying machine using the motor control device can store data unique to the brushless motor in the storage means built in the brushless motor in advance, and provide a highly accurate brushless motor. With the detection position correction function of the position detector, the brushless motor can be driven efficiently from low speed to high speed, and the operation data required for the product is stored in common with the storage means, so that there is no waste. An inexpensive drum-type washing machine or drum-type washing and drying machine can be realized.

The block diagram which shows the structure of the motor control apparatus of Embodiment 1 of this invention. The figure which shows the relationship between the induced voltage and position detection signal of a brushless motor motor part in the motor control device Diagram of ideal case of line induced voltage of brushless motor motor part and position detector signal in the same motor controller The figure when the line induced voltage of the brushless motor motor part and the signal of the position detector are misaligned in the motor control device. The figure when the line induced voltage of the brushless motor motor part and the signal of the position detector are misaligned in the motor control device. Explanatory drawing of the model of the brushless motor motor part in the motor control device (A) Connection diagram of storage means, etc., at the brushless motor production site of the motor control device (b) Connection schematic block diagram of the drum type washer / dryer with the motor control device incorporated The figure which shows the storage area arrangement example of the memory | storage means of the motor control apparatus Longitudinal sectional view of a drum-type washing and drying machine using the motor control device Block diagram showing the configuration of a conventional motor control device

  According to a first aspect of the present invention, there is provided a motor control device comprising: a brushless motor; a position detector that detects a rotor position built in the brushless motor; an inverter that drives the brushless motor; and a current that the inverter passes through the brushless motor. A current detector to detect, and a control circuit for controlling the inverter that drives the brushless motor using output signals of the position detector and the current detector, and the control circuit includes a plurality of brushless motors. The three-phase alternating current to be applied to the plurality of windings of the brushless motor is rotated more slowly in advance than during the operation to control the current flowing through the winding of the positionless detector, A range in which the direction of the three-phase alternating current when the output signal changes is detected and the detected value of the direction of the three-phase alternating current is predetermined If the detected value of the direction of the three-phase AC current is within a predetermined range, the detected value of the direction of the three-phase AC current is detected. These output values are stored in the first predetermined area of the storage means built in the brushless motor as correction values for the position detection signal of the brushless motor, and are built into the brushless motor during operation of the brushless motor. The brushless motor is controlled using the output signal of the position detector and the correction value of the position detection signal stored in the first predetermined area of the storage means.

  This makes it possible to recognize the phase shift inherent to the brushless motor by obtaining the correction value of the position detection signal from the storage means built in the brushless motor at the time of operation without having to perform a trial run as a product. Stored data can be stored using the storage means. In addition, brushless motors whose position detection signals deviate more than the standard value can be selected in the production process and can be eliminated before being incorporated into the product, so that there is no need for replacement after incorporation into the product. Furthermore, since the storage means can be shared, it is not necessary to provide another second storage means on the product side, and it is possible to cope with a low price.

  In a second aspect based on the first aspect, the control circuit rotates the brushless motor clockwise and counterclockwise, and changes the output signal of the position detector in each rotation direction. Detects the direction of the three-phase alternating current, and detects the position by detecting an abnormality if the average value of the detected values of the three-phase alternating current direction obtained in each rotation direction is outside the predetermined range. When the average value of the detected values in the direction of the three-phase alternating current obtained in the respective rotation directions is within a predetermined range, the average value of the detected values in the direction of the three-phase alternating current is obtained. Is stored in the second predetermined area of the storage means as a correction value of the position detection signal of the brushless motor.

As a result, the trial operation for detecting the correction of the position detection signal at the time of single brushless motor production eliminates the influence of the friction of the shaft or load of the brushless motor, and the position detector mounted on the brushless motor. The output position detection signal can be measured and corrected with high accuracy and stored in the storage means. If a brushless motor with a position detection signal deviating greatly from the standard value is installed, it is regarded as a single defective product. Since it can be easily eliminated, a motor control device that efficiently drives a brushless motor from low speed to high speed can be realized. Furthermore, since the storage means can be shared, it is not necessary to provide another second storage means on the product side, and it is possible to cope with a low price.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the control circuit applies a three-phase alternating current by performing a current control to flow through the plurality of windings of the brushless motor, and the plurality of the brushless motors. Rotate the three-phase alternating current applied to the windings of the coil more slowly than in operation, and detect the direction of the three-phase alternating current in the same period as the number of pole pairs of the brushless motor, to the number of pole pairs of the brushless motor When the average value of the detected values in the direction of the three-phase alternating current obtained in a corresponding manner is outside the predetermined range, the abnormality is detected and the position detection correction is finished, and the number of pole pairs of the brushless motor is supported. If the average value of the detected values in the direction of the three-phase alternating current obtained in the above is within a predetermined range, the average value of the detected values in the direction of the three-phase alternating current is detected as the position of the brushless motor. Is intended to store a third predetermined area of said storage means as a correction value of No..

  As a result, by performing trial operation to detect the correction value of the position detection signal in advance when producing a brushless motor alone, it is less affected by variations in the position detection signal for each pole pair of the brushless motor, and is mounted on the brushless motor. The position detection signal, which is the output of the position detector, can be accurately measured, corrected, and stored. Further, when a brushless motor whose position detection signal deviates greatly from the standard value is detected, it is possible to easily perform NG determination and eliminate it. Therefore, it is possible to realize a motor control device that efficiently drives a brushless motor from low speed to high speed. Furthermore, when this brushless motor is mounted on a product, the storage means in the brushless motor can be shared as a storage means linked to a control circuit on the product side, so that it is necessary to provide another second storage means on the product side. It becomes possible to respond at a low price.

  According to a fourth aspect of the present invention, in the first to third aspects of the invention, the storage of the storage means in the first, second, and third predetermined areas is performed when the brushless motor is produced or the brushless motor is incorporated. By installing a brushless motor that is implemented in a state where the connection load during rotation of the brushless motor is unaffected before the product is completed, measuring the brushless motor as a single unit has no other effects. The correction value of the phase shift of the motor itself can be measured and can be stored in the built-in storage means as unique data of the brushless motor alone.

  In other words, the unique correction value (position detection signal correction value) of the brushless motor alone can be reliably detected and stored in the built-in storage means, so the brushless motor stores its own characteristics by itself. You will be able to clarify your substance. When driving with a control circuit on the product set side that adopts and drives a brushless motor, the substance (correction value) of this brushless motor is input from the storage means built in the brushless motor and driven based on the correction value. Can be done.

  Furthermore, by connecting the storage means with a built-in brushless motor to the control circuit of the product to be mounted, the data obtained from the product can be stored in the storage means. It is not necessary to arrange the storage means.

In a fifth aspect based on the first to fourth aspects, the storage means stores data desired to be stored in a product in which the brushless motor is incorporated in an area other than the first, second, and third predetermined areas. By adopting a configuration capable of storing, it is possible to store data on individual brushless motors and necessary data on the incorporated products. That is, since the control circuit can input the correction value stored in the storage means, data and information obtained when operating as a product can be stored in different areas of the same storage means. For this reason, it is not necessary to have a storage means on the product side, and it becomes possible to store data inexpensively and efficiently by combining the storage means.

  A sixth invention is a drum-type washing machine or drum-type washing / drying machine using the motor control device according to any of the first to fifth inventions. At the time of dehydration requiring low torque, the drum storing the laundry can be driven efficiently in any process, and an efficient drum type washing machine or drum type washing and drying machine can be realized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same structure as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description. Further, the present invention is not limited by this embodiment.

  Here, in the embodiment of the present invention, the brushless motor motor unit 2 corresponds to the conventional brushless motor 12, and the entire brushless motor including the position detector 3 and the storage means 5 is referred to as a brushless motor 20 and will be described below. To do.

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of a motor control device according to Embodiment 1 of the present invention. In FIG. 1, the inverter 11 for driving the brushless motor section 2 includes switching elements SWU and SWX, SWV and SWY, SWW and SWZ connected in series, one set in parallel, and three sets in parallel, for a total of six switching elements. In FIG. 1, an IGBT is used as a switching element as an example. The upper side (collector side) of the switching element SWX is connected to the connection point of a set of two switching elements, for example, the lower side (emitter side) of the switching element SWU, and the winding of the brushless motor motor unit 2 from the connection point. Connected to the wire.

  Low resistances RU, RV, RW, which are current detection resistors, are individually connected to the emitter side of each of the lower switching elements SWX, SWY, SWZ connected in series, and the other end of each low resistance is Connected to the negative side of the inverter power supply. Both ends of each current detection low resistance are input to the current detection circuit 4. Each low resistance RU, RV, RW and the current detection circuit 4 constitute a current detector 10 that detects the current of the brushless motor unit 2. The current detection circuit 4 amplifies voltages at both ends of the low resistances RU, RV, and RW, and outputs them as analog signals iu, iv, and iw. This signal is input to a control circuit 1 constituted by a microcomputer or the like, performs A / D conversion, and is used as a current detection value for speed control, torque control, etc. of the brushless motor 20.

  The brushless motor 20 is mounted with the position detector 3 incorporated therein. An output signal CS from the position detector 3 is input to a control circuit 1 constituted by a microcomputer or the like, and is used for speed control, torque control, etc. of the brushless motor 20 in the same manner as the current detection signal described above.

  FIG. 1 is an example of the embodiment, and other switching elements such as MOSFETs and bipolar transistors can be used as the switching elements to be used. In addition, although the configuration in which three low current detection resistors are used as the configuration of the current detector 10 has been described as an example, for example, a single current detection resistor may be configured.

FIG. 2 is a diagram showing the relationship between the induced voltage of the brushless motor of the motor control apparatus according to Embodiment 1 of the present invention and the signal of the position detector. The winding of the brushless motor section 2 is the U phase,
V phase and W phase. In FIG. 2, when the rotor of the brushless motor section 2 is rotated from the outside, the induced voltage generated at the U-phase winding terminal from the neutral point is Eu, and the induced voltage generated at the V-phase winding is Ev, The voltage generated in the W-phase winding is Ew. In general, the neutral point often does not appear as a terminal outside the brushless motor, and is often represented by a line voltage. The induced line voltage generated at the U phase winding terminal with respect to the W phase winding terminal is Euw, and the induced line voltage generated at the V phase winding terminal with respect to the U phase winding terminal is Evu, V phase. Ewv is the line induced voltage generated at the W-phase winding terminal with reference to the winding terminal.

  In general, three output signals from the position detector 3 are output in a three-phase brushless motor. CS1, CS2, and CS3 shown in FIG. 2 are examples of output signals of the position detector 3. CS1 is the above-described line-induced voltage Euw, CS2 is the line-induced voltage Evu, and CS3 is the line-induced voltage Ewv. This is a synchronized signal, that is, a signal whose logic changes when each line-induced voltage is 0 V (zero volts). In FIG. 2, the signal of the position detector 3 is synchronized with the induced voltage between the lines, but it may be a signal synchronized with Eu, Ev, Ew that is the induced voltage of each phase.

  The position detector 3 generally detects the magnetic flux of the magnet of the rotor of the brushless motor motor unit 2 or the magnetic flux of the magnet for position detection mounted coaxially with the rotor by a Hall element or Hall IC. At this time, variation factors such as magnetization accuracy, mounting accuracy of the Hall element or Hall IC to the printed wiring board, accuracy of mounting the printed wiring board inside the brushless motor 20, and detection sensitivity of the magnetic flux of the Hall element or Hall IC are included. is there. The deviation between the line induced voltage and the signal of the position detector 3 due to these variation factors and the correction method thereof are described with reference to FIG. 2 and the line induced voltage Euw of the brushless motor motor unit 2 and the position detector 3 A description will be given using CS1, which is one of output signals.

  FIG. 3 is an example of a diagram in an ideal case of the line induced voltage and the signal of the position detector 3. The position detection signal CS1 is synchronized with the line induced voltage Euw. That is, the logic of the position detection signal CS1 changes at the position where the line-to-line induced voltage Euw is 0 V (zero volt) and zero crossing. 4 and 5 are examples of diagrams in the case where the line induced voltage and the signal of the position detector 3 are shifted. FIG. 4 shows an example in which the position detection signal CS1 advances with respect to the line induced voltage Euw, and FIG. 5 shows an example with a delay.

  The rotor position of the brushless motor motor unit 2 when controlling the brushless motor motor unit 2 is interpolated with the position of the CS1, CS2, and CS3 detected by the position detector 3 as described above. Calculated and calculated. Therefore, if there is a deviation in the position detection signal as described above, the output current waveform is distorted or the phase of the current is advanced or delayed with respect to the position of the rotor of the brushless motor motor unit 2, resulting in an adverse effect such as a reduction in efficiency or noise. give. Further, the advance angle control is performed when the induced voltage of the brushless motor section 2 is relatively high with respect to the power supply voltage. In this case, the performance may be adversely affected due to the displacement of the position detection signal. There is sex. Hereinafter, a method for correcting the detection position of the position detector 3 by performing a trial run for correcting the position detection signal in advance will be described.

  FIG. 6 is an explanatory diagram showing a model of the brushless motor section of the motor control apparatus according to Embodiment 1 of the present invention. Further, the relationship between the induced voltage and the output signal of the position detector when the brushless motor section of FIG. 6 is rotated clockwise is as shown in FIG. FIG. 6 shows a two-pole model for ease of explanation. In the two-pole model, the electrical angle and the mechanical angle are the same value. The stator has three windings: a U-phase winding U, a V-phase winding V, and a W-phase winding W. A magnet is arranged on the rotor. Let us consider the rotation coordinate of the angle θ in the clockwise direction with the direction of the U phase of the winding as the origin. The magnetic pole inside the stator that is generated when current is supplied from the winding of each stator is defined as N pole.

  Now, the direction of the combined magnetic flux generated by each winding of the stator when a three-phase alternating current is applied to each winding is defined as the direction of the angle θ. The N pole is generated in the positive direction of the a-axis and the S pole is generated in the negative direction of the a-axis in the stator of FIG. The rotor of the brushless motor section 2 is attracted in the direction of the S pole in the positive direction of the a-axis and the N pole in the negative direction by the attraction and repulsion action with the magnetic poles of the stator. When the angle θ is slowly rotated in this state, the rotor of the brushless motor motor unit 2 also rotates slowly while maintaining the S pole in the positive direction of the a-axis and the N pole in the negative direction. When the angle θ is rotated, the output signal of the position detector 3 also changes with the rotation of the rotor of the brushless motor motor unit 2. The difference of the angle θ when the output signal of the position detector 3 is changed from the original position is stored in the storage means 5 as a correction value. At the time of detecting the correction value of the position detection signal of the brushless motor unit 2, a constant composite current is passed in the a-axis direction, and the change point of the signal of the position detector 3 is detected by slowly rotating the angle θ. Details of an example of current control during detection and details of detection of the angle θ will be described below.

  A current control method when detecting the correction value of the position detection signal of the brushless motor unit 2 will be described. The peak value of the three-phase alternating current applied to each winding is I *. I * is set to I *> 0. The angle θ between the winding U and the a axis is an arbitrary value. If the current command value of the U-phase winding U is iu *, the current command value of the V-phase winding V is iv *, and the current command value of the W-phase winding W is iw *, then iu * = I * Cos θ, iv * = I * cos (θ−120 °), iw * = I * cos (θ−240 °). The current iu of the U-phase winding U, the current iv of the V-phase winding V, and the current iw of the W-phase winding W are detected by the current detector 10 of FIG. The Using each current command value and current detection value, current control is performed on the three-phase winding. For example, PI control is performed as current control.

  The difference between the current command value iu * of the U-phase winding U and the detected current value iu is Δiu (Δiu = iu * −iu). Similarly, the current command value iv * of the V-phase winding V and the detected current value iv Δiv (Δiv = iv * −iv), the difference between the current command value iw * of the W-phase winding W and the current detection value iw is Δiw (Δiw = iw * −iw), the proportionality constant is Kp, Let the integration constant be Ki. The applied voltage vu to the U-phase winding U, the applied voltage vv to the V-phase winding V, and the applied voltage vw to the W-phase winding W of the brushless motor section 2 are expressed by the following (Equation 1) to ( It is calculated | required by Formula 3).

vu = Kp × Δiu + Ki × ΣΔiu (Equation 1)
vv = Kp × Δiv + Ki × ΣΔiv (Expression 2)
vw = Kp × Δiw + Ki × ΣΔiw (Equation 3)

  When detecting the correction value of the position detection signal, current control is performed by applying the voltages vu, vv, vw of the three-phase windings obtained in this way to the brushless motor motor unit 2 from the inverter 11. By this current control, the combined magnetic flux generated by each winding of the brushless motor motor unit 2 is controlled in the positive direction of the a-axis, and the angle θ is the direction of the three-phase alternating current.

  Next, the details of the method for detecting the direction θ of the three-phase alternating current will be described. As a representative, the detection of the change point from H to L of the position detection signal CS1 during clockwise rotation will be described using the diagram showing the relationship between the induced voltage of the brushless motor section 2 and the output signal of the position detector shown in FIG. To do. In the present embodiment, since the brushless motor section 2 is a two-pole model, the point where the position detection signal CS1 changes from H to L is one place with one round of 360 ° mechanical angle.

From FIG. 2, the position at an electrical angle of 30 degrees is an ideal position of the change point from H to L of the position detection signal CS1 when rotating clockwise. Let this ideal position be θcs1 *. On the other hand, the three-phase alternating current is rotated more slowly than in the washing operation while performing the current control. Specifically, the three-phase alternating current is slowly rotated while performing current control so that the brushless motor motor unit 2 is rotated at a low speed of about 0.1 rpm with respect to the rotation speed of 500 rpm during washing.
When the direction θ of the three-phase alternating current is gradually increased, the rotor of the brushless motor unit 2 rotates clockwise, and CS1 which is one of the output signals of the position detector 3 changes from H to L around 30 °. . The direction of the three-phase alternating current at this time is θcs1. For example, as shown in FIG. 3, when the position detection signal CS1 almost coincides with 0 V (zero volt) of the line induced voltage Euw, θcs1 is about 30 °.

  Also, as shown in FIG. 4, when the position detection signal CS1 is ahead of the line induced voltage Euw, θcs1 is a value smaller than 30 °. Further, when the position detection signal CS1 is behind the line induced voltage Euw as shown in FIG. 5, θcs1 becomes a value larger than 30 °.

  In the case of the relationship between the induced voltage and the position detection signal as shown in FIG. 2, the position information of the position detection signal generally changes every 60 ° in electrical angle. For example, when the position detection signal and the induced voltage of the brushless motor motor unit 2 are guaranteed to have an accuracy of ± 10 °, if the detected θcs1 is within ± 10 ° from the ideal position, the brushless motor motor The part 2 is a product within the standard, and if it exceeds ± 10 °, it is an abnormal product. When the detected θcs1 exceeds a predetermined value, an abnormality is detected, a position detection correction abnormality signal is output, and the position detection correction is terminated.

  When the detected θcs1 is in a normal range, θcs1 is stored in the first predetermined area of the storage means 5 built in the brushless motor 20 of FIG. 1 as a correction value of the position detection signal.

  Although the method for detecting and storing the correction value of the position detection signal has been described above, when the brushless motor motor unit 2 is actually driven, for example, when the brushless motor motor unit 2 is driven in the clockwise direction, one of the position detection signals is used. When a certain CS1 changes from H to L, the position detection signal correction value θcs1 stored in advance in the storage means 5 of the brushless motor 20 is used without using 30 ° which is the ideal position θcs1 *. By using it as angle information, the brushless motor unit 2 can be driven efficiently.

  For the sake of explanation, the change point of CS1 from H to L, which is one of the signals of the position detector 3 when the rotor of the brushless motor section 2 is rotated clockwise, has been described, but other position detection signals CS2, The correction value of the position detection signal can also be detected by the same method for CS3 and the change point from L to H. Moreover, even if it rotates counterclockwise instead of clockwise, it can detect similarly.

(Embodiment 2)
When the correction value of the position detection signal described in the first embodiment is detected, for example, when the brushless motor motor unit 2 is connected to a load and is affected by friction, the rotor of the brushless motor motor unit 2 is It is expected that the follow-up is slightly delayed from the direction θ of the three-phase alternating current.

  Therefore, in the motor control device according to the second embodiment of the present invention, as a trial operation for correcting the position detection signal performed in advance, the brushless motor motor unit 2 is rotated clockwise and counterclockwise, respectively. The direction of the three-phase alternating current when the output signal of the position detector 3 changes is detected. If the average value of the detected values obtained in the respective rotational directions exceeds a predetermined value, the position detection correction is abnormally terminated, and the average value of the detected values obtained in the respective rotational directions is predetermined. If the average value of the detected values is within the range of the measured value, the average value of the detected values is stored in the second predetermined area of the storage means 5 of the brushless motor 20 as the correction value of the position detection signal of the brushless motor motor unit 2, thereby reducing the influence of friction. It can be detected without receiving, and can be driven efficiently when the brushless motor unit 2 is driven.

(Embodiment 3)
When the brushless motor section 2 is other than 2 poles, for example, 4 poles, the change point from H to L of CS1 which is one of the position detection signals when the rotor described in the first embodiment is clockwise. There are two places 180 ° apart from each other at the mechanical angle of the motor. If the positions of the change points from H to L of the two position detection signals CS1 are different, there is a possibility that an error in the correction value of the position detection signal becomes large if only one position is detected.

  In this case, the change point of CS1 from H to L in two position detection signals separated by 180 ° in mechanical angle is detected, and the average value of the two detection values obtained corresponding to the 2 to 4 poles is If the value exceeds a predetermined value, the position detection correction ends abnormally, and if the average value of the two detection values obtained corresponding to 2 to 4 poles is within a predetermined value range, the detection is performed. By storing the average value as a correction value of the position detection signal of the brushless motor section 2 in the third predetermined area of the storage means 5 in the brushless motor 20, even a four-pole brushless motor can be driven efficiently. Can do.

  Similarly, the brushless motor motor unit 2 having more poles detects the direction θ of the three-phase AC current at the signal change point corresponding to the number of pole pairs, and the average value thereof is used as a position detection signal for the brushless motor motor unit 2. Is stored in the storage means 5 in the brushless motor 20 as a correction value for the same, it is possible to drive the brushless motor motor unit 2 efficiently in the same manner.

(Embodiment 4)
The motor control device according to Embodiment 4 of the present invention is the same as in Embodiments 1 to 3 described above, with respect to the storage in the plurality of predetermined areas of the storage means 5 during the production of the brushless motor 20 or the drum type washing machine. As a specific data of the brushless motor 20 itself, the brushless motor 20 is mounted before the completion of the product in which the brushless motor 20 is incorporated, and the connection load during the rotation of the brushless motor motor 2 is not affected. This is stored in the built-in storage means 5. Thereby, by measuring the correction value of the position detection signal in a single state of the brushless motor 20, the correction value of the phase shift of the brushless motor 20 itself without any other influence can be measured. Further, the correction value data of the position detection signal obtained by the product is transferred to the storage means 5 built in the brushless motor 20 by connecting to the control circuit 1 of the product on which the storage means 5 built in the brushless motor 20 is mounted. Since it can be memorized, it is not necessary to arrange the second memory means in the product control circuit 1 again.

  Further, when the brushless motor 20 is manufactured, the phase shift can be verified and stored in the storage unit 5, and when the product is incorporated as a product, the same applies to the subsequent operations using the stored data of the storage unit 5. As can be seen, the storage means 5 must be a non-volatile memory that cannot be erased even if the stored value is not supplied with power.

  By making the storage means 5 a non-volatile memory, when producing the brushless motor 20 with the storage means 5 added to the brushless motor motor unit 2, the position detection signal is corrected at the time of shipment from the factory. By storing the correction value in the nonvolatile memory that is the storage means 5, the correction value is stored even when the power is turned off, and the brushless motor motor unit can be efficiently performed without correcting the position detection signal when the power is turned on again. 2 can be driven.

(Embodiment 5)
In the motor control device according to the fifth embodiment of the present invention, in the first to fourth embodiments, the storage unit 5 includes the brushless motor 20 incorporated in an area other than the first, second, and third predetermined areas. Data to be stored of a finished product such as a drum-type washing machine can be stored, and data of 20 individual brushless motors and necessary data for an incorporated product can be stored.

  That is, the correction value unique to the brushless motor 20 alone (correction value of the position detection signal) can be reliably detected in a single state, and can be stored in the storage means 5 built in the brushless motor 20. Thereby, the brushless motor 20 can memorize its own characteristics and clarify its own substance.

  For example, FIG. 8 shows an example of the storage area arrangement of the storage means 5 in the present embodiment. For simplicity, the address of the location * 4 in the memory area is “60”, and the address of the location * 5 is “82”.

  Assuming that the first, second, and third predetermined areas are * 1, * 2, and * 3 shown in FIG. 8, the addresses are expressed as "04", "14", "05", "05" 15 ”,“ 06 ”and“ 16 ”. As for the address of the predetermined area of the storage means 5, as shown in FIG. 8, in the process of producing the brushless motor 20, the inverter 11, the current detector 10, and the current detection are performed using equipment and jigs in the factory. A circuit 4 and a control circuit 1 for controlling them are provided as equipment, and they are connected to a brushless motor 20 and designated. Then, as described in the first to third embodiments, the correction value of the position detection signal is stored in the first, second, and third predetermined areas of the addresses respectively designated as necessary. Of course, the brushless motor 20 includes the position detector 3, the brushless motor motor unit 2, and the storage means 5.

  Which correction value is selected for the correction values of the first, second, and third predetermined areas stored in the storage means 5 depends on the correction value measurement in the operation check of the brushless motor 20 alone. For example, there may be no big difference.

  However, if it is not assembled into a product, the effect of the difference is not understood and meaningless. Therefore, the confirmation may be measured with an actual product, and it may be determined whether the correction value stored in the first, second, or third predetermined area is used preferentially.

  An area for calculating the correction value of the phase shift according to the first to fourth embodiments and storing the correction value in the storage unit 5 built in the brushless motor 20 is a predetermined area. If the address of this predetermined area is fixed, the correction value specific to the phase shift of the brushless motor 20 becomes clear even after the brushless motor 20 is shipped and incorporated in the product.

  That is, the image shown in FIG. 7A is a process for storing the correction value of the position detection signal of the brushless motor unit 2 in a predetermined area of the storage means 5 in the production process of the brushless motor 20 alone. It is a connection image of equipment and equipment, and the correction value of the position detection signal is calculated with the contents described in the first to third embodiments, and the value is stored in a predetermined area of the storage means 5 (for example, according to the first embodiment In this case, an instruction is given from the equipment control circuit 1 so as to be stored in the first predetermined areas “04” and “14”, and the storage means 5 in the brushless motor 20 stores them.

  In the process of producing a product, for example, a drum type washing / drying machine using the brushless motor 20, the brushless motor 20 is incorporated in the drum type washing / drying machine 30 as shown in FIG.

An example of the configuration of the drum-type washing and drying machine described above is shown in FIG. A drum is located at the center, and a brushless motor 20 controlled by the motor control device of the present invention is disposed below the drum. Further, the control circuit 1 is arranged at the front lower part of the drum-type washing / drying machine 30 at the lower left side of the figure, and the connection within the product is connected by the lead wire unit 21. Therefore, the control circuit 1 and the brushless motor 20 are connected via the lead wire unit 21, and the brushless motor 20 is placed in a predetermined area of the storage means 5 built in the brushless motor 20.
A correction value for the unique position detection signal is stored.

  The control circuit 1 inputs a correction value stored in a predetermined area of the storage unit 5 before driving the brushless motor 20. Based on this input value, necessary control (rotation instruction) as a product is performed.

  The control circuit 1 for driving the drum type washing / drying machine 30 drives the brushless motor 20 in the same manner as the operation of other loads. In order to confirm whether it is a thing, the numerical value memorize | stored in the address of the predetermined area (for example, said 1st predetermined area "04" "14") of the said memory | storage means 5 is input as a correction value, and this numerical value is inputted. Based on this, the brushless motor 20 is driven. Therefore, when assembled, the storage means 5 in the brushless motor 20 can be accessed via a line connected to the control circuit 1 on the product side.

  Originally, when incorporated in a product, connection must be made to drive the brushless motor 20. In addition, the output of the position detector 3 must be obtained, and some connection has been conventionally required. The line of the storage means 5 will be added to the combined line this time. However, the power of the position detector 3 may be supplied from the product side from the past, and the storage means is only required by adding two lines for access. I / O to 5 is possible.

  Here, if the write address of the correction value of the position detection signal at the manufacturing site of the brushless motor 20 is determined in advance at the time of production as described above, data exchange at that address is possible without any problem. Thus, a plurality of correction values and other conditions can be set.

  In addition, a drum-type washing machine that performs washing and dewatering by rotating a drum containing laundry, and a drum-type washing and drying machine that also performs drying are low speed and large torque during washing or drying, and high speed and low torque during dehydration. Must be driven. When a brushless motor is used as a drum driving motor of a drum-type washing machine or drum-type washing / drying machine, it is desired to increase the induced voltage to some extent in order to ensure efficiency during washing. For this reason, since the induced voltage of the brushless motor is relatively high with respect to the power supply voltage during dehydration, it is common to perform advance angle control. By mounting the brushless motor controlled by the motor control device according to the first to fourth embodiments on a drum-type washing machine or drum-type washing and drying machine, the drum can be driven efficiently and efficient drum-type washing. A machine or drum-type washing and drying machine can be realized.

  Further, for example, information to be stored (for example, operating conditions (operation mode, washing, drying conditions, etc.) set by the user) related to operating the drum type washing / drying machine is conventionally stored on the product circuit. However, according to the present invention, by using the storage means 5 incorporated in the brushless motor 20 as a separate requirement, the conventional storage means on the circuit of the product becomes unnecessary. In order to make good use of the storage means 5, as described above, predetermined areas (first, second, and third predetermined areas) for storing the data of the individual brushless motors 20 are reliably determined (in the above example, the address “04”, “14”, “05” “15”, “06” “16”) By using a place other than that area, it is possible to share the data storage location, and the drum-type laundry that is inexpensive and inexpensive A machine or drum-type washing and drying machine can be realized.

As described above, according to the motor control device of the present invention and the drum-type washing machine or the drum-type washing / drying machine using the same, data unique to the brushless motor 20 can be stored in the storage means 5 built in advance, The brushless motor 20 can be driven efficiently from low speed to high speed by the detection position correction function of the position detector 3 with high accuracy. Further, since the brushless motor 20 whose position detection signal deviates more than the standard value can be selected in the production process and can be eliminated before being incorporated into the product, there is no need for replacement after incorporation into the product.

  Further, according to the present invention, since the storage means 5 is located away from the product control circuit 1, it is possible to drive other loads (for example, a cooling fan motor, a heat pump drying compressor, etc.). It will be away from the circuit. These loads may emit very noise components, and when accessing the storage means 5, these loads are stopped, but the stored data is affected by noise. The smaller the number is, the better. From the viewpoint of the location of the storage means 5, the tendency is good.

  Furthermore, with regard to the ambient temperature of the electronic component, the drive circuit for driving various loads is dense as described above for the control circuit 1 of the product, and the current flowing through the load is also about 10A. There is a lot of heat generation and cooling. Since the cooling circuit is used to cool the control circuit 1 as a whole, there is a possibility that a part that does not generate heat may reach a certain temperature due to the influence of the ambient temperature.

  Rather than disposing the storage means 5 in such an environment, it is built in the brushless motor 20 and disposed in the same area as the position detector 3, so that the ambient temperature environment is clearly lower than that of the control circuit 1. Can do.

  Further, according to the present invention, when the product-side control circuit 1 that employs and drives the brushless motor 20 controlled by the motor control device of the present invention is used for driving, the substance (correction value) of the brushless motor 20 is brushless. Input can be made from the storage means 5 built in the motor 20, and the drive can be performed based on the correction value.

  Since the control circuit 1 can input the correction value stored in the storage means 5, the position detection signal of the brushless motor motor unit 2 of the same storage means 5 is used as the data and information obtained when operating as a product. Can be stored in an area (address) different from the correction value. For this reason, it is not necessary to have a storage means on the product side, and it becomes possible to store data inexpensively and efficiently by combining the storage means.

  In addition, a drum-type washing machine that performs washing and dewatering by rotating a drum containing laundry, and a drum-type washing and drying machine that also performs drying are low speed and large torque during washing or drying, and high speed and low torque during dehydration. However, by installing a brushless motor controlled by the motor controller of the present invention, the drum can be driven efficiently, and an efficient drum-type washing machine or drum-type washing dryer can be installed. Can be realized.

  As described above, the motor control device according to the present invention and the drum-type washing machine or the drum-type washing / drying machine using the motor control device are efficiently brushless from low speed to high speed without being affected by variations in the detection position of the position detector. The motor can be driven, the variation in the detection position of the position detector is stored in the storage means built in the brushless motor, and the other storage area of the storage means can be used as a data storage location obtained during product operation. A motor control device especially used for home-use drum-type washing machines or drum-type washer / dryers, because it can be easily incorporated into products with optimal settings when incorporating into motors during product production or replacement in the market. And a drum-type washing machine or a drum-type washing / drying machine using the same.

DESCRIPTION OF SYMBOLS 1 Control circuit 2 Brushless motor motor part 3 Position detector 4 Current detection circuit 5 Memory | storage means 10 Current detector 11 Inverter 20 Brushless motor

Claims (6)

Brushless motor, position detector for detecting a rotor position built in the brushless motor, an inverter for driving the brushless motor, a current detector for detecting a current that the inverter flows to the brushless motor, and the position detection And a control circuit that controls the inverter that drives the brushless motor using an output signal of the current detector, and the control circuit performs current control to flow through the plurality of windings of the brushless motor. Apply three-phase alternating current, rotate the three-phase alternating current applied to the plurality of windings of the brushless motor more slowly than in operation, and the three-phase alternating current when the output signal of the position detector changes The direction of the current is detected, and if the detected value of the direction of the three-phase alternating current is outside the predetermined range, an abnormality is detected and the position is detected. When a detection correction abnormality signal is output and the detected value in the direction of the three-phase alternating current is within a predetermined range, the detected value in the direction of the three-phase alternating current is output, and these output values are output to the brushless motor. As a correction value of the position detection signal of the brushless motor, it is stored in the first predetermined area of the storage means built in the brushless motor, and when the brushless motor is operated, the output signal of the position detector built in the brushless motor The motor control apparatus which controls the said brushless motor using the correction value of the position detection signal memorize | stored in the 1st predetermined area of the said memory | storage means. The control circuit rotates the brushless motor clockwise and counterclockwise, detects the direction of the three-phase alternating current when the output signal of the position detector changes in each rotation direction, When the average value of the detected values in the direction of the three-phase alternating current obtained in the rotation direction is outside the predetermined range, the abnormality is detected and the position detection correction is finished, and the detection value is obtained in each rotation direction. When the average value of the detected values in the direction of the three-phase alternating current is within a predetermined range, the average value of the detected values in the direction of the three-phase alternating current is used as a correction value for the position detection signal of the brushless motor. The motor control device according to claim 1, wherein the motor control device is stored in a second predetermined area of the storage means. The control circuit applies a three-phase alternating current by performing a current control to flow through the plurality of windings of the brushless motor, and the three-phase alternating current to be applied to the plurality of windings of the brushless motor is slower than during operation in advance. And detecting the direction of the three-phase alternating current in the same period as the number of pole pairs of the brushless motor, and the detected value of the direction of the three-phase alternating current obtained corresponding to the number of pole pairs of the brushless motor If the average value of the three-phase alternating current is outside the predetermined range, the abnormality is detected and the position detection correction is terminated, and the detected value of the direction of the three-phase alternating current obtained corresponding to the number of pole pairs of the brushless motor is detected. If the average value is within a predetermined range, the average value of the detected values in the direction of the three-phase alternating current is used as a correction value for the position detection signal of the brushless motor in the third predetermined area of the storage means. The motor control device according to claim 1 or 2 resides. The storage in the first, second and third predetermined areas of the storage means is affected by the connection load during the rotation of the brushless motor during the production of the brushless motor or before the completion of the product in which the brushless motor is incorporated. The motor control apparatus of any one of Claims 1-3 which mounted the brushless motor implemented in the state which is not carried out. 5. The storage device according to claim 1, wherein the storage unit can store data desired to be stored in a product in which the brushless motor is incorporated in an area other than the first, second, and third predetermined areas. The motor control apparatus described. A drum type washing machine or a drum type washing and drying machine using the motor control device according to any one of claims 1 to 5.

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