KR20120137144A - Apparatus for adjustment motor position signal of green car and method thereof - Google Patents

Abstract

PURPOSE: An apparatus for adjusting a motor position signal of a green car and a method thereof are provided to improve maintainability by excluding malfunctions due to the wrong detection of a motor location signals. CONSTITUTION: An apparatus for adjusting a motor position signal of a green car comprises a resolver(100), a filter(110), a shaper(120,130), a RDC(Resolver to digital converter)(140), comparators(150,160), and a controller(170). The resolver outputs the location signal(S1-S4) of a motor rotor. The filter filters the location signal into a set range. The shaper adjusts a size gain and offset with regard to the filtered location signals. The RDC provides information of abnormal state of a resolver and the location information to the controller. The comparators compares the filtered location signal with the location signal passed through the motor rotator. The compared result is provided to a controller. The controller adjusts and shapes the size gain and offset with regard to the filtered location signals through the shapers according to the information applied from the comparer. [Reference numerals] (100) Resolver; (110) Filter; (120) First shaper; (130) Second shaper; (140) RDC; (170) Controller; (AA) Location information

Description

APPARATUS FOR ADJUSTMENT MOTOR POSITION SIGNAL OF GREEN CAR AND METHOD THEREOF}

The present invention relates to an apparatus and method for adjusting a motor position signal of an environment-friendly vehicle, and more particularly, to detect a motor position signal having a standardized dispersion by adjusting a magnitude and an offset of a signal detected by a resolver. The present invention relates to a motor position signal adjusting apparatus and method for an environmentally friendly vehicle.

Permanent magnet synchronous motor is applied as a driving source to hybrid electric vehicle (HEV) or electric vehicle (EV), and accurate information about the position of rotor pole is needed for high performance control of permanent magnet synchronous motor. .

In a hybrid vehicle (HEV) / electric vehicle (EV), a resolver having a high environmental resistance and a wide temperature range is commonly used as a means for detecting a position of a motor.

If the position signal output from the resolver is out of the specified signal level due to disconnection or short circuit between the resolver and RDC (Resolver to Digital Converter) during operation, the RDC recognizes the disconnection or short circuit of the resolver signal line and controls it. Transfer to the means.

Therefore, when the fault signal is input from the RDC, the control unit typically stops the motor operation in order to prevent burnout of the high voltage component due to an abnormal control.

Permanent magnet synchronous motors applied to HEV / EV are installed in the engine room with the resolver installed, and the position signal requiring high precision output from the resolver is controlled through the electric wire as an analog signal. Is input to the means.

In addition, since the hybrid (HEV) / electric vehicle (EV) uses a high voltage, it has a structure that is very vulnerable to noise and signal distortion due to its characteristics.

In particular, the resolver mounted on the permanent magnet synchronous motor causes signal distortion due to eccentricity and deflection components, and the connector connecting the motor stage and the RDC causes deterioration due to durability and contact failure caused by vibration during driving. Intermittent abnormality of position signal and malfunction of error detection are generated.

In this case, it is detected as a false failure, rather than a true failure requiring maintenance, resulting in a major quality problem causing increased service costs and customer complaints.

As such, when the quality of the resolver signal is poor in the dynamometer of the hybrid vehicle (HEV) / electric vehicle (EV), the control instability and the poor performance of the HEV / EV function cannot be overcome in reality.

Therefore, in the related art, in order to stably detect a position signal of a resolver, development according to a Try and Error method for optimizing a fault detection threshold is applied, thereby causing a problem in that the development time is delayed.

In addition, by using expensive noise countermeasures to prevent noise from entering the resolver's position signal, an overdesigned and highly accurate device can be used to meet the specification, thereby increasing test time for cost increase and verification. There is a problem that an increase occurs.

According to an embodiment of the present invention, by adjusting the magnitude and offset of the signal input from the resolver, the detection of the motor position signal having a standardized dispersion can be provided, thereby providing reliability to the position signal, thereby providing stability in controlling the motor. And reliability.

According to an embodiment of the present invention, in an environmentally friendly vehicle, a resolver for outputting a position signal of a motor rotor; A filter for filtering the position signal of the motor rotor output from the resolver to a predetermined band; A shaping machine for adjusting a gain and an offset of a magnitude with respect to a position signal of the motor rotor passing through the filter; An RDC which decodes the position signal of the motor rotor passing through the filter and the shaper and provides the controller with position information of the motor rotor and information on whether the resolver is abnormal; A comparator for comparing the position signal of the motor rotor passed through the shaper with the position signal of the motor rotor passed through the filter and providing a comparison result to the controller; According to the information applied from the comparator, a motor position signal adjusting apparatus for an eco-friendly vehicle including a control unit for adjusting and shaping a gain and an offset of a magnitude with respect to a position signal of a motor rotor through a shaper may be provided.

The shaper includes a variable gain amplifier for adjusting a gain of magnitude with respect to a position signal of a motor rotor; It may be configured as an offset controller for adjusting the offset of the magnitude relative to the position signal of the motor rotor.

The shaping unit includes: a first shaping unit that adjusts gain and offset with respect to a first position signal S1 of the motor rotor according to a control signal of the controller; The second shaper may be configured to adjust a gain and an offset with respect to the third position signal S3 of the motor rotor.

The comparator includes: a first comparator for comparing the first position signal S1 of the motor rotor passed through the first shaping machine with the second position signal S2 of the motor rotor passed through the filter; The second position comparator may be configured to compare the third position signal S3 of the motor rotor passed through the second shaping machine and the fourth position signal S4 of the motor rotor passed through the filter.

In addition, according to another embodiment of the invention the process of setting the target size and the offset of the signal to the position signal of the motor rotor output from the resolver; Measuring a position signal output from the resolver and comparing the set target size with an offset; If the magnitude of the position signal output from the resolver does not coincide with the target magnitude and offset, a method for adjusting the motor position signal of an eco-friendly vehicle including adjusting a gain and offset to form a target magnitude and offset may be provided.

With respect to the position signal output from the resolver, the gain for the magnitude may be adjusted and then the offset may be standardized.

As described above, according to the embodiment of the present invention, the position signal of the motor can be standardized to improve the occurrence of malfunction due to intermittent abnormalities and signal distortions. Thus, the motor control performance and the fault detection of the hybrid vehicle (HEV) / electric vehicle (EV) The reliability can be greatly improved.

In addition, it is possible to improve the maintainability and customer dissatisfaction by eliminating the occurrence of failure due to the misdetection of the motor position signal.

1 is a view schematically showing a motor position signal adjusting apparatus of an environment-friendly vehicle according to an embodiment of the present invention.
2 is a waveform diagram of an input / output signal of a resolver in an apparatus for adjusting a motor position signal of an environmentally friendly vehicle according to an exemplary embodiment of the present invention.
3 is a waveform diagram illustrating adjustment of a resolver position signal in a motor position signal adjusting apparatus of an environmentally friendly vehicle according to an exemplary embodiment of the present invention.
4 is a flowchart illustrating a motor position signal adjusting procedure of an eco-friendly vehicle according to an exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

The present invention can be embodied in various different forms, and thus the present invention is not limited to the embodiments described herein.

1 is a view schematically showing a motor position signal adjusting apparatus of an environment-friendly vehicle according to an embodiment of the present invention.

1, an embodiment of the present invention includes a resolver 100, a filter 110, a first shaper 120, a second shaper 130, a resolver to digital converter (RDC) 140, The first comparator 150, the second comparator 160, and the controller 170 are included.

The resolver 100 is modulated by the excitation signals EXT_R1 and EXT_R2 input from the RDC 140 to output the position signals S1-S4 of the motor rotor in the form of SIN and COS.

SIN and COS signals, which are the position signals S1-S4 of the motor rotor output from the resolver 100, have voltage values between 1V and 4V according to the transformer ratio.

The filter 110 filters the position signals S1-S4 of the motor rotor output from the resolver 100 to a predetermined band to remove noise components included in the position signals.

The first and second shapers 120 and 130 may include a variable gain amplifier that can adjust a gain with respect to a position signal of a motor rotor, and an offset controller that can adjust an offset.

The first shaper 120 adjusts a gain and an offset with respect to the first position signal S1 of the motor rotor passing through the filter 110 according to a control signal applied to the controller 170.

The second shaper 130 adjusts a gain and an offset with respect to the third position signal S3 of the motor rotor that has passed through the filter 110 according to a control signal applied to the controller 170.

The RDC 140 extracts the position information of the motor rotor by decoding the position signals S1-S4 of the motor rotor that have passed through the filter 110 and the first and second shapers 120 and 130, and then controls the controller 170. To provide.

The RDC 140 decodes the position signals S1-S4 of the motor rotor passing through the filter 110 and the first and second shapers 120 and 130 to determine whether the resolver 100 is abnormal. In case an abnormality is detected, information of 'FAULT' is provided to the controller 170.

The first comparator 150 compares the first position signal S1 of the motor rotor passing through the first shaper 120 with the second position signal S2 of the motor rotor passing through the filter 110. (A) is provided to the control unit 170.

The second comparator 160 compares the third position signal S3 of the motor rotor passing through the second shaping unit 130 with the fourth position signal S4 of the motor rotor passing through the filter 110. (B) is provided to the control unit 170.

The controller 170 controls the speed and torque of the motor according to the position information of the motor rotor applied from the RDC 140, and when the information of 'FAULT' is applied, the controller 170 determines that the resolver 100 is broken and operates the motor. To stop.

In addition, the controller 170 may control the first motor of the motor rotor through the first shaper 120 and the second shaper 130 according to the information applied from the first comparator 150 and the second comparator 160. The gain and offset of the position signal S1 and the third position signal S3 are adjusted to shape the magnitude and the offset to improve the reliability in detecting the signal.

The operation of the motor position signal adjusting apparatus of the eco-friendly vehicle according to the present invention including the function as described above is performed as follows.

When the eco-friendly vehicle to which the present invention is applied operates, the resolver 100 is modulated by the excitation signals EXT_R1 and EXT_R2 input from the RDC 140 to position signals S1-of the motor rotor having voltage values of 1V to 4V. S4) is output in the form of SIN and COS and applied to the filter 110.

The filter 110 filters the position signals S1-S4 of the motor rotor output from the resolver 100 in a set band to remove noise components included in the position signals S1-S4, and then the first position signal. (S1) is applied to the first shaper 120, and the third position signal S3 is applied to the second shaper 130, and to the second position signal S2 and the fourth position signal S4. Is applied to the RDC 140 as it is.

The RDC 140 extracts the position information of the motor rotor by decoding the position signals S1-S4 of the motor rotor that have passed through the filter 110 and the first and second shapers 120 and 130, and then controls the controller 170. To provide.

In addition, the RDC 140 decodes the position signals S1-S4 of the motor rotor passing through the filter 110 and the first and second shapers 120 and 130 to determine whether the resolver 100 is abnormal. When the abnormality is detected, information of 'FAULT' is provided to the controller 170.

The controller 170 controls the speed and torque of the motor according to the position information of the motor rotor applied from the RDC 140, and when the information of 'FAULT' is applied, the controller 170 determines that the resolver 100 is broken and operates the motor. To stop.

The first comparator 150 compares the first position signal S1 of the motor rotor passing through the first shaper 120 with the second position signal S2 of the motor rotor passing through the filter 110. As a result (A) is provided to the control unit 170, the second comparator 160 is the motor rotation through the third position signal (S3) and the filter 110 of the motor rotor through the second shaper 130 and the filter 110. The former fourth position signal S4 is compared and the result B is provided to the controller 170.

At this time, the control unit 170 according to the comparison result (A) (B) of the position signals (S1-S4) applied from the first comparator 150 and the second comparator 160, the first position signal of the motor rotor The control signals A 'and B' for adjusting the gain and the offset of the S1 and the third position signal S3 are applied to the first formatter 120 and the second formatter 130.

Accordingly, the first shaper 120 including the variable gain amplifier and the offset controller includes the first of the motor rotors passing through the filter 110 according to the control signal A applied to the control unit 170. The gain and the offset are adjusted with respect to the position signal S1, and the second shaper 130 adjusts the first and second motor rotors through the filter 110 according to the control signal B applied to the controller 170. The gain and offset are adjusted with respect to the 3 position signal S3.

Accordingly, the magnitude and the offset of the first position signal S1 of the motor rotor passing through the first shaper 120 and the second position signal S2 passing through the filter 110 coincide with each other. The magnitude and offset of the third position signal S3 of the motor rotor having passed through) and the fourth position signal S4 having passed through the filter 110 correspond to each other and are recognized by the controller 170 as a stable signal.

Therefore, the control performance reduction and the operation stop due to the error detection of the position signal failure of the motor rotor and the abnormality of the speed and the position information in the RDC are not generated, so that reliability can be provided for the driving.

2 is a waveform diagram of an input / output signal of a resolver in a motor position signal adjusting apparatus of an eco-friendly vehicle according to an embodiment of the present invention, and FIG. 3 is a motor position signal adjusting apparatus of an eco-friendly vehicle according to an embodiment of the present invention. This is a waveform diagram showing adjustment of the resolver position signal.

The position signals S1-S4 of the motor rotor which are modulated by the excitation signals EXT + _R1 and EXT-_R2 input from the RDC 140 and output in the form of SIN and COS from the resolver 100 are shown in FIG. 2. The same waveform is output and input to the RDC 140.

However, when an eccentricity and a deflection occur in mounting the resolver 100, a distortion of the signal is generated due to the influence thereof. When the connector is damaged due to deterioration of the connector and vibration occurs while driving the motor, the motor rotor Variations occur in the magnitude and offset of the position signal at.

3 is a waveform diagram illustrating adjustment of a resolver position signal in a motor position signal adjusting apparatus of an environmentally friendly vehicle according to an exemplary embodiment of the present invention.

As can be seen in FIG. 3, the target amplitude and offset of the signal are set with respect to the position signal of the motor rotor output from the resolver 100, and the actual position signal output from the resolver 100 is detected and set. Compare to the target magnitude of the signal.

At this time, when the actual position signal output from the resolver 100 and the target magnitude of the signal do not coincide with each other, the gain is adjusted with respect to the position signal of the motor rotor to be equal to the target amplitude of the signal.

When the gain adjustment is completed with respect to the position signal of the motor rotor, the offset is finally adjusted.

That is, the controller 170 measures the peak and the bottom of the frequency for the actual position signal of the motor rotor input through the first comparator 150 and the second comparator 160 for several periods. The peak-bottom of the signal is detected and then the gain is adjusted to the desired magnitude.

Then, the peak and bottom of the envelope of the gain-adjusted signal are re-measured and the offset is adjusted so that the offset (Peak-Bottom) / 2 is the center of the target value.

For example, as shown in Cases 1 and 2 of FIG. 6, even if distortion of the position signal occurs, the correction may be performed so as to approach the stable position target signal.

4 is a flowchart schematically illustrating a motor position signal adjusting procedure of an eco-friendly vehicle according to an exemplary embodiment of the present invention.

Referring to FIG. 4, when driving of the driving motor of the eco-friendly vehicle to which the present invention is applied starts (S101), the controller 170 controls the target magnitude of the signal with respect to all the position signals of the motor rotor output from the resolver 100. And offset is set (S102).

Thereafter, the magnitudes of the first and second position signals S1 and S2 output from the resolver 100 are measured (S103), and the measured first and second position signals S1 and S2 are compared with the set target magnitudes. It is determined whether they match with each other (S104).

If the first and second position signals S1 and S2 measured in the determination of S104 and the set target magnitude do not coincide with each other, the controller 170 outputs from the resolver 100 through the first shaper 120. The gains of the first and second position signals S1 and S2 are adjusted so that the first and second position signals S1 and S2 output from the resolver 100 match the set target magnitudes (S105).

As described above, when the first and second position signals S1 and S2 output from the resolver 100 are matched with the set target magnitudes by adjusting the gain with respect to the first and second position signals S1 and S2, the first and second positions 1 and 2 are adjusted. The magnitudes of the position signals S1 and S2 are measured (S106), and the measured first and second position signals S1 and S2 are compared with the set target offsets to determine whether they coincide with each other (S107).

If the measured first and second position signals S1 and S2 and the set target offset do not coincide with each other, the controller 170 outputs from the resolver 100 through the first formatter 120. The offsets of the first and second position signals S1 and S2 are adjusted so that the first and second position signals S1 and S2 output from the resolver 100 coincide with the set target offsets (S108).

After the adjustment of the magnitude and offset with respect to the first and second position signals S1 and S2 is completed through the above procedure, the magnitudes of the third and fourth position signals S3 and S4 detected by the resolver 100 are measured; In operation S110, the measured third and fourth position signals S3 and S4 may be compared with the set target magnitude to determine whether they match each other (S111).

If the measured third and fourth position signals S3 and S4 and the set target magnitude do not coincide with each other, the control unit 170 outputs from the resolver 100 through the second shaper 130. The gains of the 3 and 4 position signals S3 and S4 are adjusted so that the 3 and 4 position signals S3 and S4 output from the resolver 100 match the set target magnitudes (S112).

If the third and fourth position signals S3 and S4 output from the resolver 100 match the set target magnitudes by adjusting the gain with respect to the third and fourth position signals S3 and S4, the third and fourth position signals ( The magnitudes of S3 and S4 are measured (S113), and the measured third and fourth position signals S3 and S4 are compared with the set target offset to determine whether they match (S114).

If the measured third and fourth position signals S3 and S4 and the set target offset do not coincide with each other, the controller 170 outputs from the resolver 100 through the second shaper 130. The third and fourth position signals S3 and S4 output from the resolver 100 are adjusted to the set target offsets by adjusting the offsets of the 3 and 4 position signals S3 and S4 (S115).

By adjusting the gain and the offset with respect to the position signal detected by the resolver 100 through the above-described procedure, the shaped position signal can be recognized by the controller 170.

In the above description, the gain and the offset are adjusted for the first and third position signals, and the shaping is performed. However, the technical configuration of the gain and the offset for the second and fourth position signals is also included in the scope of the present invention.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

100: resolver 110: filter
120: first shaping machine 130: second shaping machine
140: RDC 150: first comparator
160: second comparator 170: control unit

Claims (6)

In environmentally friendly vehicles,
A resolver for outputting a position signal of the motor rotor;
A filter for filtering the position signal of the motor rotor output from the resolver to a predetermined band;
A shaping machine for adjusting a gain and an offset of a magnitude with respect to a position signal of the motor rotor passing through the filter;
An RDC which decodes the position signal of the motor rotor passing through the filter and the shaper and provides the controller with position information of the motor rotor and information on whether the resolver is abnormal;
A comparator for comparing the position signal of the motor rotor passed through the shaper with the position signal of the motor rotor passed through the filter and providing a comparison result to the controller;
A control unit for shaping and adjusting gain and offset of a magnitude with respect to a position signal of a motor rotor through a shaper according to information applied from a comparator;
Motor position signal adjusting device of the eco-friendly vehicle comprising a. The method of claim 1,
The shaper includes a variable gain amplifier for adjusting a gain of magnitude with respect to a position signal of a motor rotor;
An offset controller which adjusts an offset of magnitude with respect to a position signal of the motor rotor;
Motor position signal adjusting device of an environmentally friendly vehicle, characterized in that consisting of. The method of claim 1,
The shaping unit includes: a first shaping unit that adjusts gain and offset with respect to a first position signal S1 of the motor rotor according to a control signal of the controller;
A second shaper for adjusting gain and offset with respect to the third position signal S3 of the motor rotor;
Motor position signal adjusting device of an environmentally friendly vehicle, characterized in that consisting of. The method of claim 1,
The comparator includes: a first comparator for comparing the first position signal S1 of the motor rotor passed through the first shaping machine with the second position signal S2 of the motor rotor passed through the filter;
A second comparator for comparing the third position signal S3 of the motor rotor passed through the second shaping machine with the fourth position signal S4 of the motor rotor passed through the filter;
Motor position signal adjusting device of an environmentally friendly vehicle, characterized in that consisting of. Setting a target magnitude and an offset of the signal with respect to the position signal of the motor rotor output from the resolver;
Measuring a position signal output from the resolver and comparing the set target size with an offset;
If the size of the position signal output from the resolver does not match the target size and offset, adjusting the gain and offset to form a target size and offset;
Motor position signal adjustment method of an environmentally friendly vehicle comprising a. The method of claim 5,
The motor position signal adjusting method of an eco-friendly vehicle, characterized in that for shaping by adjusting the gain with respect to the position signal output from the resolver and then adjusting the offset.

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