KR20120132188A - Controling apparatus and method for motor-drive unit - Google Patents

Controling apparatus and method for motor-drive unit Download PDF

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Publication number
KR20120132188A
KR20120132188A KR20110050869A KR20110050869A KR20120132188A KR 20120132188 A KR20120132188 A KR 20120132188A KR 20110050869 A KR20110050869 A KR 20110050869A KR 20110050869 A KR20110050869 A KR 20110050869A KR 20120132188 A KR20120132188 A KR 20120132188A
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KR
South Korea
Prior art keywords
switching element
switching
motor
rotor
state
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KR20110050869A
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Korean (ko)
Inventor
조성훈
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콘티넨탈 오토모티브 시스템 주식회사
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Priority to KR20110050869A priority Critical patent/KR20120132188A/en
Publication of KR20120132188A publication Critical patent/KR20120132188A/en

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Abstract

The present invention discloses a control apparatus and method for a motor drive system. The control device and method of the motor drive system according to the present invention, in the three-phase motor for switching control with a phase difference of 120 degrees, the switching element for supplying the current in the phase is controlled to the on / off state and correspondingly the switching operation By controlling the switching element to the ON state, it is possible to minimize the current spark generated in the switching operation of the three-phase motor that is controlled by a 60-degree phase difference, and to eliminate the noise and vibration generated by the current spark of the motor product The effect can fundamentally improve durability and reliability.

Description

CONTROLING APPARATUS AND METHOD FOR MOTOR-DRIVE UNIT}

The present invention relates to an apparatus and method for controlling a motor drive system. More particularly, the present invention relates to a three-phase motor having a 60-degree phase difference by adjusting a switching time of a switching element of an inverter for providing a current to a three-phase motor having a 120-degree phase difference. An apparatus and method are provided for removing current sparks occurring in a phase motor.

1 and 2, a general motor driving system includes a stator 12 equipped with a hall sensor 16, and a rotor 14 for rotating the stator 12. 16 detects a position signal when the rotor 14 rotates.

Here, when a current flows through the Hall sensor conductor or a semiconductor and a magnetic field in the vertical direction is applied thereto, a current flows between the input terminals by using a phenomenon in which a potential difference occurs in the vertical direction of the current and the magnetic field (hole effect). When the magnetic field is applied to the sensor surface, a Hall voltage is generated which is proportional to the product of the magnetic field and the control current in the direction perpendicular to both the current and the magnetic field.

In addition, the inverter 40 converts the DC power supplied from the outside into a three-phase AC power (U, V, W) in the form of a pulse having an arbitrary variable frequency and supplies the motor 10 to the six switching elements. It is a normal switching circuit composed of (Q1 to Q6) and a diode.

The controller 50 receives the rotor position information of the motor 10 detected through the hall sensor 16 and controls the pattern of the PWM signal supplied to the inverter 40. When receiving the position signals (S1, S2, S3) detected by the Hall sensor 16 generates a PWM signal to the switching element (IPM; Q1 ~ Q6) for switching the power of the stator coil 12.

One of the switching elements included in the inverter controlling the three-phase motor is controlled to be in an on state, and the corresponding switching elements are controlled to be in opposite switching states.

For example, the switching element Q1 is switched on by the PWM signal supplied from the controller 50 for controlling the current flow from the A to the B phase, and the switching element Q1 is turned on with a phase difference of 60 degrees. It is switched to the off state and the corresponding switching element Q4 is switched to the on state.

Therefore, whenever the switching elements Q1 and Q4 are switched at such 60 degree intervals, a spark of current supplied to the motor is generated, and this current spark is an electromagnetic wave component of the noise component, causing vibration and noise of the motor and Crazy influence of control.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to control a switching element for supplying a current in a corresponding phase in a three-phase motor for switching control with a 120 degree phase difference. As a result, by controlling the switching element that is switched in reverse, the current spark generated in the switching operation of the three-phase motor controlled by the phase shift of 60 degrees can be minimized, and the current spark generated by the current spark of the motor can be reduced. An object of the present invention is to provide a control device and method for a motor drive system that can fundamentally improve durability and reliability of a product by removing noise and vibration.

The control device of the motor drive system according to the first aspect of the present invention for achieving the above object,

A motor provided with a rotor and a stator,

It includes a control unit for generating and transmitting a PWM signal at a 180-degree period for receiving the rotor position information of the motor supplied from the Hall sensor to supply to the inverter provided with a plurality of switching elements,

The control unit,

Generating a PWM signal for switching on / off a first switching element corresponding to a corresponding phase selected from the rotor position information among the plurality of switching elements,

And generate a PWM signal for switching the second switching element that is turned on to correspond to the first switching element to the on state.

Here, it is preferable that the first switching element is switched to the on / off state every 180 degrees, and the second switching element is preferably provided to maintain the on state.

It is preferable that the first switching element is provided with a high side transistor.

In addition, it is preferable that the second switching device be provided with a low side transistor.

Control method of a motor drive system according to a second aspect of the present invention for achieving the above object,

Selecting a switching element of the inverter connected to the stator winding of the motor according to the position of the rotor of the motor in the controller;

Generating a PWM signal for driving the selected switching element and supplying the same to the switching element to supply a current to the corresponding rotor; And

Rotating the motor in accordance with the rotational torque of the rotor and state,

The PWM signal generation step,

Switching the first switching element corresponding to the corresponding phase selected through the position information of the rotor among the plurality of switching elements to an on / off state,

The second switching device corresponding to the first switching device is characterized in that it is provided to switch to the on-state switching.

Here, the first switching device is switched to the on / off state every 180 degrees, whereas the second switching device is preferably provided to maintain the on state.

Here, it is preferable that the first switching element is provided with a high side transistor.

In addition, it is preferable that the second switching device be provided with a low side transistor.

As described above, according to the existing and method of the control device of the motor drive system according to the present invention, in a three-phase motor for switching control with a phase difference of 120 degrees, the switching element for supplying current in the corresponding phase is in an on / off state. By controlling the switching element to the on state and the corresponding counter-switching operation to the on state, it is possible to minimize the current spark generated in the switching operation of the three-phase motor that is controlled by a 60-degree phase difference and to the current spark of the motor By removing the noise and vibration generated, it is possible to fundamentally improve the durability and reliability of the product.

1 is a view showing the configuration of a general motor drive system.
2 is a view showing in detail the configuration of the motor shown in FIG.
3 is a view showing the configuration of a control device of a motor drive system according to the present invention.
FIG. 4 is a waveform diagram illustrating a PWM signal shown in FIG. 3.
5 is a flowchart illustrating a control process of the motor drive system according to the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention. In addition, about the part same as a conventional structure, the same code | symbol and the same name are written together. In addition, in the embodiment of the present invention will be described as an example that the current flows from the A phase to the C phase.

3 is a view showing the configuration of a control device of a motor drive system according to an embodiment of the present invention. Referring to Figure 3, the control device of the motor drive system according to the present invention, in the three-phase motor for switching control with a phase difference of 120 degrees, the switching element for supplying a current to the phase is controlled in the on / off state and corresponding And on the contrary, it is provided to control the switching element which is switching operation to an on state, and this apparatus includes the motor 10, the control part 30, and the interlock 50. As shown in FIG.

In addition, the motor 10 includes a conventional rotor 14 and a stator 12. The stator 12 has three coils each having an electrical phase difference of 120 degrees, and rotates as current flows in the coil. A magnetic field can be generated, and the hall sensor fixed to the stator is composed of three Hall sensors 16 having a phase difference of 120 degrees to detect the position of the rotating rotor, and the rotor rotates the inside or outside of the stator coil and is usually 2 The permanent magnet of the pole is installed to correspond to the three coils of the stator 12.

The control unit 30 generates a PWM signal for controlling the on / off of the switching element based on the hall signal provided from the hall sensor for detecting the rotational position of the rotor 14, and the generated PWM signal is an inverter ( 50 to the corresponding switching elements Q1-Q6.

That is, the inverter 50 serves to control the motor 10.

The inverter 50 includes six switching elements Q1, Q2, Q3, Q4, Q5, and Q6, and on / off is performed according to each control signal. That is, in order to apply a desired voltage to the winding of the motor 10, the Hall element signal generated differently according to the position of the rotor of the motor 10 is received and the switching elements Q1, Q2, Q3, Q4, Q5 and Q6. To control the switching state.

Referring to the drawings, the switching elements Q1 and Q4, the switching elements Q3 and Q6, and the switching elements Q5 and Q2 are connected in series, and each of them is configured in parallel. Here, the switching element Q1, the switching element Q3, and the switching element Q5 are located in front of the motor 10, and the switching element Q2, the switching element Q4, and the switching element Q6 are It is located at the rear end of the motor 10.

The stator windings A, B, and C of the motor 10 are connected between the switching elements Q1 and Q4, the switching elements Q3 and Q6, and the switching elements Q5 and Q2.

Here, the PWM signal of the control unit 30 in the three-phase motor that is switched controlled by the 120 degree phase difference, the first switching element of one of the corresponding switching elements derived from the rotor position signal to form a rotating magnetic field having a 120 degree phase difference Is controlled to be turned on / off and a second switching element which is inversely switched driving corresponding to the first switching element is generated to be controlled to the on state.

For example, as shown in FIG. 4, for example, when the current is to flow from the A phase to the C phase, the switching element Q1 is switched ON / OFF and the switching element Q6. It can be seen that is always on during the interval.

According to this configuration, the control unit 30 controls the switching element Q1 for supplying the current to the on / off state in the three-phase motor for switching control with a phase difference of 120 degrees. The switching element Q6 is controlled to the on state.

Here, the switching element Q1 is provided as a high side transistor, and the second switching element Q6 is provided as a low side transistor.

Therefore, the inverter 50 rotates in the stator 12 by switching the switching elements Q1 to Q6 so that rotation torque is generated between the stator 12 and the rotor 14 according to the PWM signal supplied from the controller 30. A magnetic field is generated and a magnetic field is formed in the rotor 14. The magnetic field of the rotor 14 is a force that tries to rotate along the rotating magnetic field generated in the stator 12 is to generate a rotational driving force while the rotor 14 rotates.

That is, when a current is applied to the plurality of coils wound on the stator, the motor 10 generates a rotating magnetic field while the polarity of each coil is sequentially changed, and a magnetic field is formed in the rotor 14. The magnetic field of the rotor is a force that tries to rotate along the rotating magnetic field generated in the stator to generate a rotational driving force as the rotor rotates.

Therefore, according to the present invention, it is possible to minimize the current spark generated in the switching operation of the three-phase motor that is controlled by a 60-degree phase difference, and to eliminate noise and vibration generated by the current spark of the motor, thereby improving durability and It can fundamentally improve reliability.

In a three-phase motor controlling switching with a phase difference of 120 degrees, a switching element for supplying a current in a corresponding phase is controlled in an on / off state and, conversely, a process of controlling a switching element in an on state corresponding to a switching operation. As follows.

FIG. 5 is a flowchart illustrating a control process of a motor driving system by the controller of FIG. 3. Referring to FIG. 5, a switching element for supplying current in a corresponding phase in a three-phase motor for switching control with a phase difference of 20 degrees is turned on / off. The process of controlling the switching element that is controlled to the off state and correspondingly the switching operation to the on state will be described in more detail.

First, the controller 30 receives the position signal of the rotor supplied from the hall sensor 16 through step 101, and then selects a corresponding phase based on the position signal of the rotor through step 103.

In addition, the controller 30 may include the first switching element Q1 formed of the high side transistor of the inverter 50 and the second switching element Q6 formed of the low side transistor to allow current to flow in the corresponding phase AC. A PWM signal for switching on is generated and transmitted (step 105).

Subsequently, in step 107, it is determined whether the phase difference on AC reaches 120 degrees, and when the phase difference reaches 120 degrees, the second switching element Q6 switches to the off state through step 109 through step 109. Create and send.

Based on the PWM signal, when the current is applied to the plurality of coils wound on the stator, the rotor magnetic field is generated while the polarity of each coil is sequentially changed, and the magnetic field is formed in the rotor 14. The magnetic field of the rotor generates a rotational driving force as the rotor rotates by a force that tries to rotate along the rotating magnetic field generated by the stator.

According to this embodiment, it is possible to minimize the current spark generated in the switching operation of the three-phase motor that is switched controlled by a 60-degree phase difference, and to eliminate noise and vibration generated by the current spark of the motor to ensure the durability and reliability of the product Can fundamentally improve.

As such, those skilled in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing to the technical spirit or essential features of the present invention. Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention .

In a three-phase motor controlling switching with a phase difference of 120 degrees, a switching element for supplying a current in a corresponding phase is controlled to an on / off state and correspondingly to a 60 degree phase by controlling a switching element that is in a switching operation to the on state. The motor drive can fundamentally improve the durability and reliability of the product by eliminating the current spark generated in the switching operation of the three-phase motor controlled by the car and eliminating the noise and vibration generated by the current spark of the motor. As a result of the significant improvement in the accuracy and reliability of the operation of the control device and method of the system, and furthermore in terms of performance efficiency, the possibility of commercially available or commercially available motors is not only sufficient but also practically clear. It is an invention with industrial applicability.

Claims (8)

A motor provided with a rotor and a stator,
It includes a control unit for generating and transmitting a PWM signal at a 180-degree period for receiving the rotor position information of the motor supplied from the Hall sensor to supply to the inverter provided with a plurality of switching elements,
The control unit,
Generating a PWM signal for switching on / off a first switching element corresponding to a corresponding phase selected from the rotor position information among the plurality of switching elements,
And a PWM signal for generating a PWM signal for switching the second switching element corresponding to the first switching element in an on state to be reversed. The control apparatus of claim 1, wherein the first switching element is switched on / off in a 180 degree period, and the second switching element is provided to maintain the on state. The control device for a motor drive system according to claim 2, wherein the first switching element is provided with a high side transistor. The control device for a motor drive system according to claim 3, wherein the second switching element is provided with a low side transistor. Selecting a switching element of the inverter connected to the stator winding of the motor according to the position of the rotor of the motor in the controller;
Generating a PWM signal for driving the selected switching element and supplying the same to the switching element to supply a current to the corresponding rotor; And
Rotating the motor in accordance with the rotational torque of the rotor and state,
The PWM signal generation step,
Switching the first switching element corresponding to the corresponding phase selected through the position information of the rotor among the plurality of switching elements to an on / off state,
The control method of the motor drive system, characterized in that it is provided to switch the second switching device corresponding to the first switching device and the reverse switching in the on state. The method of claim 5, wherein the first switching element is switched on / off in a 180 degree period, while the second switching element is provided to maintain the on state. The method according to claim 6, wherein the first switching element is provided with a high side transistor. The method according to claim 7, wherein the second switching element is provided with a low side transistor.
KR20110050869A 2011-05-27 2011-05-27 Controling apparatus and method for motor-drive unit KR20120132188A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20110050869A KR20120132188A (en) 2011-05-27 2011-05-27 Controling apparatus and method for motor-drive unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20110050869A KR20120132188A (en) 2011-05-27 2011-05-27 Controling apparatus and method for motor-drive unit

Publications (1)

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KR20120132188A true KR20120132188A (en) 2012-12-05

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KR20110050869A KR20120132188A (en) 2011-05-27 2011-05-27 Controling apparatus and method for motor-drive unit

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