KR101875628B1 - Apparatus and method for detecting wiring mismatch - Google Patents

Abstract

The miswire detecting device includes a back electromotive voltage detecting unit for detecting a line-to-line back electromotive voltage of windings constituting a stator of a three-phase motor and outputting a plurality of line-to-line back electromotive voltage signals; A rotation angle detecting unit, a phase difference acquiring unit for acquiring a phase difference between each of the line-to-line counter electromotive voltage signals and the rotation angle signal, and a judging unit for judging whether or not erroneous wiring of the power supply lines for applying power to the three- .

Description

[0001] APPARATUS AND METHOD FOR DETECTING WIRING MISMATCH [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a miswiring detection apparatus and method, and more particularly to a miswiring detection apparatus and method applied to a motor.

A hybrid electric vehicle represents a vehicle that efficiently combines two or more different power sources. Hybrid vehicles use a motor with a relatively low torque characteristic at a low speed as the main power source and an engine with a relatively high torque characteristic at high speed as a main power source.

Electric vehicles are vehicles powered by electricity. The electric vehicle uses a motor to obtain the driving force of the vehicle.

Generally, three phases of U, V, and W power sources are applied to a drive motor that provides drive power to the vehicle.

When the power supply lines supplied with the three-phase power supply are erroneously connected in the assembling process of the driving motor, a reverse phase occurs, and the vehicle runs in the reverse direction or the driving motor can not be controlled.

The problem to be solved by the embodiments is to provide a miswiring detection apparatus and method for detecting miswiring of power supply wirings applied to a motor.

According to an embodiment of the present invention for solving the above problems, there is provided an apparatus for detecting miswiring, comprising: a back electromotive voltage detector for detecting a line back electromotive voltage of a winding constituting a stator of a three-phase motor and outputting a plurality of line back electromotive voltage signals; A phase difference acquiring unit for acquiring a phase difference between the line-to-line back electromotive voltage signal and the rotation angle signal, and a power supply line for supplying power to the three-phase motor based on the phase difference, And may include a judging unit for judging whether or not a wrong connection is made.

According to a second aspect of the present invention, there is provided a method for detecting miswiring in a misfire detecting apparatus, comprising the steps of: generating a plurality of interphase voltage signals corresponding to a line-

Generating a rotation angle signal by using an output signal of the resolver, obtaining a first phase difference between each of the inter-line voltage signals and the rotation angle signal, and supplying power to the three-phase motor based on the first phase difference And judging whether or not the power supply lines to be erroneously connected.

According to the embodiment, the erroneous wiring of the power supply lines can be effectively detected in the assembling process of the motor.

1 schematically shows a miswiring detecting apparatus according to an embodiment.
2 shows an example of an output signal of the counter-electromotive voltage detector according to the embodiment.
3 is a view for explaining the operation of the resolver.
4 shows the input / output signals of the resolver rotation angle detector according to the embodiment.
FIG. 5 shows the line-to-line counter-electromotive voltage signals and the rotation angle signal in the case of normal connection.
6 shows an example of the line-to-line counter-electromotive voltage signals and the rotation angle signal in the case of miswiring.
Fig. 7 schematically shows a false wiring detection method according to the embodiment.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly illustrate the embodiments of the present invention, portions that are not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a faulty wire detection apparatus and method according to embodiments will be described in detail with reference to the drawings.

FIG. 1 schematically shows a miswiring detecting apparatus according to an embodiment, and FIG. 2 shows an example of an output signal of a counter-electromotive voltage detecting unit according to an embodiment. Fig. 3 is a view for explaining the operation of the resolver, and Fig. 4 shows an input / output signal of the resolver rotation angle detecting unit according to the embodiment. FIG. 5 illustrates line-by-line back electromotive voltage signals and rotation angle signals in the case of a normal connection, and FIG. 6 illustrates line-to-line back electromotive voltage signals and rotation angle signals in the case of a miswiring.

1, a miswiring detecting apparatus 100 may include a counter electromotive voltage detecting unit 110, a rotation angle detecting unit 120, a phase difference obtaining unit 130, and a determining unit 140. Referring to FIG.

A three-phase motor (motor 5) to which three phases (U phase, V phase, W phase) are supplied is configured such that when a rotor is rotated by an external force, (Back ElectroMotive Force, BEMF).

The back electromotive voltage detector 110 detects a back electromotive force (or back electromotive force) between the windings of different phases constituting the stator of the motor 5 and outputs a back electromotive force voltage signal. 2, the back electromotive voltage detector 110 detects the UV line back electromotive voltage, the VW line back electromotive voltage, and the WU line back electromotive voltage to generate a sinusoidal wave signal, such as a UV line back electromotive voltage signal (BEMF _{U -V} ), a VW line back electromotive voltage Signal (BEMF _{V -W} ) and the WU inter-line counter electrode voltage signal (BEMF _WU ).

The resolver 10 is a position sensor for detecting the rotation angle of the motor 5. [

3, the resolver 10 includes a stator 13 which is wound inside the housing 11 by a coil and a rotor 15 which is formed by a permanent magnet provided inside the stator 13 . The resolver 10 includes input terminals R1 and R2 to which an AC voltage is supplied and a first output terminal for outputting a sinusoidal wave signal in accordance with the position of the rotor 15, And a second output terminal (L3, L4) for outputting a first harmonic wave (L1, L2) and a cosine wave signal.

The rotating shaft of the resolver (10) is engaged with the rotating shaft of the motor (5) and rotates. Therefore, the rotor 15 of the resolver 10 is rotated in association with the rotation of the motor 5 rotor.

The rotor 15 of the resolver 10 is driven by the drive of the motor 5 in a state where an excitation signal E sin ωt which is an AC voltage is applied to the stator 13 through the input terminals R1 and R2 The magnetic coupling coefficient between the stator 13 and the rotor 15 changes. Thereby, carrier frequency signals in the form of sinusoidal waves which are amplitude-modulated through the first output terminals L1 and L2 and the second output terminals L3 and L4 of the resolver 10 are outputted. The carrier frequency signal output through the first output terminals L1 and L2 is a sinusoidal wave signal KE sin? T sin ?, and the carrier frequency signal output through the second output terminals L3 and L4 is a cosine (cosine) wave signal (KE sin? t? cos?). Here,? Is the rotation angle of the rotor 15 detected by the resolver 10.

The rotation angle detector 120 receives the output signals of the resolver 10 (the sin wave signal KE sin? T? Sin? And the cosine wave signal KE sin? T cos?), And outputs the rotation angle signal corresponding to the rotation angle.

The rotation angle detecting unit 120 can obtain the rotation angle signal by converting the output signals of the resolver 10 into digital values. The rotation angle detector 120 may convert output signals of the resolver 10 into rotation angle signals using a trigonometric method, a method using an angular tracking observer, or the like.

Referring to FIG. 4, the rotation angle detector 120 receives the output signals of the resolver 10, which is an AC voltage signal, and converts them into digital values to output a triangle wave (or sawtooth) rotation angle signal.

The phase difference acquisition unit 130 receives the line-to-line counter electrode voltage signals BEMF _{U -V} , BEMF _{V -W} , and BEMF _{W -U} and the rotation angle signal from the counter electrode voltage detection unit 110 and the rotation angle detection unit 120, The phase difference between the line-to-line counter-electromotive voltage signals (BEMF _{U -V} , BEMF _{V -W} , and BEMF _{W -U} ) and the rotation angle signal is obtained.

As shown in FIG. 5, the phase difference obtaining unit 130 detects a zero-crossing point of each of the line-to-line counter-electromotive force voltage signals and the rotation angle signal, and detects a zero crossing point of each line- The phase difference? Between the line-to-line counter-electromotive voltage signal and the rotation angle signal can be obtained based on the position difference between the zero crossing points.

The determination unit 140 receives the phase difference between the line-to-line counter electromotive voltage signals and the rotation angle signal from the phase difference obtaining unit 130 and determines whether the three-phase power supply lines applied to the motor 5 are misconnected or mis- .

The determining unit 140 can determine whether the power lines are misconnected by comparing the phase difference in the case of the normal connection and the phase difference obtained in the phase difference obtaining unit 130 with each other. The determination section 140 may obtain the phase difference between the line-to-line counter electromotive voltage signals and the rotation angle signals in the state of the normal connection in advance and store them in a memory (not shown) for mis-connection determination.

Table 1 below shows the phase difference between the line-to-line counter-electromotive voltage signal and the rotation angle signal for the case of normal connection and the case of mis-connection.

Table 1. Phase difference between each line-to-line voltage signal and rotation angle signal

Referring to Table 1, when the power wiring is normally connected to the U terminal to which the U phase power is applied, the V terminal to which the V phase power is applied, and the W terminal to which the W phase power is applied in the motor 5, signal (BEMF _{U -V)} and the rotational phase difference between the signals, VW line-to-line reverse voltage signal _(V BEMF _-W) with a phase difference in rotation and the WU line-to-line reverse voltage signal (BEMF _{W -U)} and the rotational phase difference between the signals among the signals Α, α + 120 °, α + 240 °, respectively. Here,? Can be determined according to the characteristics of the motor 5 and the resolver 10.

On the other hand, the U-phase power supply wiring, the W-phase power supply wiring, and the V-phase power supply wiring are connected to the U terminal to which the U phase power is applied, the V terminal to which the V phase power is applied, (Miswiring 1), the phase difference between the UV inter-line counter electrode voltage signal (BEMF _{U -V} ) and the rotation angle signal, the phase difference between the VW line interphase voltage signal (BEMF _{V -W} ) and the rotation angle signal, and the WU line- The phase difference between the signal (BEMF _{W -U} ) and the rotation angle signal is represented by α + 60 °, α + 300 °, and α + 180 °, respectively.

Further, V phase power supply wiring, U phase power supply wiring, and W phase power supply wiring are connected to the U terminal to which the U phase power is applied, the V terminal to which the V phase power is applied, and the W terminal to which the W phase power is applied, (Miswiring 2), the phase difference between the UV inter-arm counter electrode voltage signal (BEMF _{U -V} ) and the rotation angle signal, the phase difference between the VW inter-arm counter electrode voltage signal (BEMF _{V -W} ) and the rotation angle signal, The phase difference between the signal (BEMF _{W -U} ) and the rotation angle signal is α + 180 °, α + 60 °, and α + 300 °, respectively.

The V phase power supply wiring, the W phase power supply wiring, and the U phase power supply wiring are connected to the U terminal to which the U phase power is applied, the V terminal to which the V phase power is applied, and the W terminal to which the W phase power is applied, (Miswiring 3), the phase difference between the UV inter-line counter electrode voltage signal (BEMF _{U -V} ) and the rotation angle signal, the phase difference between the VW line interphase voltage signal (BEMF _{V -W} ) and the rotation angle signal and the WU line- The phase difference between the signal (BEMF _{W -U} ) and the rotation angle signal is represented by α + 120 °, α + 240 °, α.

The W phase power supply wiring, the U phase power supply wiring, and the V phase power supply wiring are connected to the U terminal to which the U phase power is applied, the V terminal to which the V phase power is applied, and the W terminal to which the W phase power is applied, (Miswiring 4), the phase difference between the UV inter-line counter electrode voltage signal (BEMF _{U -V} ) and the rotation angle signal, the phase difference between the VW line interphase voltage signal (BEMF _{V -W} ) and the rotation angle signal, The phase difference between the signal (BEMF _{W -U} ) and the rotation angle signal is α + 240 °, α °, α + 120 °, respectively.

The W phase power supply wiring, the V phase power supply wiring, and the U phase power supply wiring are connected to the U terminal to which the U phase power is applied, the V terminal to which the V phase power is applied, and the W terminal to which the W phase power is applied, (Miswiring 5), the phase difference between the UV inter-line counter electrode voltage signal (BEMF _{U -V} ) and the rotation angle signal, the phase difference between the VW line interphase voltage signal (BEMF _{V -W} ) and the rotation angle signal, and the WU line- The phase difference between the signal (BEMF _{W -U} ) and the rotation angle signal is represented by α + 300 °, α + 180 °, and α + 60 °, respectively.

FIG. 5 shows the line-to-line counter electromotive voltage signals (BEMF _{U -V} , BEMF _{V -W} , and BEMF _{W -U} ) and the rotation angle signal in the case of the normal connection, Voltage signals (BEMF _UV , BEMF _{V -W} , BEMF _{W -U} ) and the rotation angle signal.

Referring to FIGS. 5 and 6, the line-to-line counter electromotive voltage signals (BEMF _{U -V} , BEMF _{V -W} , and BEMF _{W -U} ) have. Assuming that the UV line-to-line counter electrode voltage signal (BEMF _{U -V} ) is taken as an example, if the phase difference between the UV line-to-line counter electrode voltage signal (BEMF _{U -V} ) and the rotation angle signal in the case of normal connection is α, The phase difference between the voltage signal (BEMF _{U -V} ) and the rotation angle signal is varied by α + 60 °.

As described above, the phase difference between the line-to-line counter-electromotive voltage signal and the rotation angle signal is different in the case of the normal connection and the case of the mis-connection. Also, the phase difference between the line-to-line counter-electromotive voltage signal and the rotation angle signal is different depending on the type of miswiring.

Accordingly, the determination unit 140 compares the phase difference between the line-to-line counter-electromotive voltage signals and the rotation angle signal in the steady state and the phase difference between the line-to-line voltage signals and the rotation angle signal acquired through the phase difference acquisition unit 130, It is possible to determine whether the power wiring lines that supply power to the power line 5 are misconnected or misconnected.

On the other hand, referring to Table 1, the phase difference between all of the line-to-line counter-electromotive voltage signals and the rotation angle signals is changed as compared with the case where the line is broken. Therefore, the judging unit 140 may judge the misconnection and misconnection type by using only the phase difference between any one of the inter-line counter electromotive force voltage signal and the rotation angle signal for the misconnection determination. For example, the determining unit 140 can determine whether a miswiring is present or not by using the phase difference between the U-V line voltage and the rotation angle signal.

7 schematically shows a mis-wiring detecting method of the mis-wiring detecting apparatus according to the embodiment.

Referring to FIG. 7, the miswire detection apparatus 100 detects line-to-line back electromotive force induced between windings of different phases constituting the stator of the motor 5 (S100) as the rotor of the motor 5 rotates (BEMF _{U -V} , BEMF _{V -W} , and BEMF _{W -U} ) (S110).

The miswire detection apparatus 100 receives the output signals (sin wave signal (KE sin? T? Sin?) And cosine wave signal (KE sin? T cos?) Of the resolver 10) And generates a rotation angle signal corresponding to the rotation angle of the electron 15 (S120).

The miswire detection apparatus 100 acquires a phase difference between the line interdigital voltage signals BEMF _UV , BEMF _{V -W} , and BEMF _{W -U} obtained in step S110 and the rotation angle signal obtained in step S120 (S130). Then, it is determined whether or not the power supply wirings applied to the motor 5 are erroneously connected (S140).

In step S140, the miswiring detecting apparatus 100 compares the phase difference between the line-to-line counter electromotive voltage signals and the rotation angle signals acquired in the normal wiring state beforehand with the phase differences obtained through the step S130, It is possible to judge whether or not the power wiring lines are misconnected.

If it is determined in step S140 that the power wiring lines are misconnected (S150), the misconnection detecting apparatus 100 determines whether the phase difference between the line-to- The misconnection type is determined based on the difference between the obtained phase differences (S160).

Referring to Table 1, it can be seen that the phase difference between the line-to-line counter-electromotive voltage signal and the rotation angle signal is different depending on the miswiring type. Therefore, the misconnection detecting apparatus 100 can determine the misconnection type of the power supply wiring based on the difference between the phase difference obtained in the step S130 and the phase difference obtained in the normal connection state.

The false wiring detection method according to the embodiment described above can be executed by software. When executed in software, the constituent means of the present invention are code segments that perform the necessary tasks. The program or code segments may be stored on a processor read functional medium or transmitted by a computer data signal coupled with a carrier wave in a transmission medium or network.

A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording device include ROM, RAM, CD-ROM, DVD-ROM, DVD-RAM, magnetic tape, floppy disk, hard disk and optical data storage device. Also, the computer-readable recording medium may be distributed over a network-connected computer device so that computer-readable code can be stored and executed in a distributed manner.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are illustrative and explanatory only and are intended to be illustrative of the invention and are not to be construed as limiting the scope of the invention as defined by the appended claims. It is not. Therefore, those skilled in the art can readily select and substitute it. Those skilled in the art will also appreciate that some of the components described herein can be omitted without degrading performance or adding components to improve performance. In addition, those skilled in the art may change the order of the method steps described herein depending on the process environment or equipment. Therefore, the scope of the present invention should be determined by the appended claims and equivalents thereof, not by the embodiments described.

100: Wrong wire detection device
110: a counter electromotive voltage detector
120: rotation angle detector
130:
140:

Claims (10)

A back electromotive voltage detector for detecting a back electromotive voltage of the windings constituting the stator of the three-phase motor and outputting a plurality of back electromotive voltage signals,
A rotation angle detector for generating a rotation angle signal using the output signal of the resolver,
A phase difference acquiring unit for acquiring a phase difference between the line-to-line counter-electromotive voltage signal and the rotation angle signal, and
And a judging section for judging whether or not power supply wirings for applying power to the three-phase motor are erroneously connected based on the phase difference. The method according to claim 1,
Wherein the rotation angle detection unit converts the sinusoidal wave signal and the cosine wave signal output from the resolver into a digital value to generate the rotation angle signal. The method according to claim 1,
Wherein the phase difference obtaining unit comprises:
And obtaining the phase difference by using a zero-crossing point of each of the line-to-line counter-electromotive voltage signals and the rotation angle signal. The method according to claim 1,
Wherein the determination unit compares the phase difference obtained by the phase difference acquisition unit with the phase difference between each line interimage voltage signal and the rotation angle signal in the steady state to determine whether the power supply lines are misconnected. 5. The method of claim 4,
Wherein the determination unit determines the type of miswiring of the power supply lines based on the difference in phase difference obtained by the phase difference obtaining unit and the difference in phase difference between the line inter-base voltage signal and the rotation angle signal in the steady state. In a misconnection detection method of a misconnection detection device,
Generating a plurality of line-to-line counter-electromotive voltage signals corresponding to line-to-line counter-electromotive voltages of the windings constituting the stator of the three-phase motor,
Generating a rotation angle signal using an output signal of the resolver,
Obtaining a first phase difference between each line-terminating voltage signal and the rotation angle signal, and
And determining whether or not the power supply wirings for applying power to the three-phase motor are erroneously connected based on the first phase difference. The method according to claim 6,
Wherein the step of generating the rotation angle signal comprises:
And converting the sine wave signal and the cosine wave signal output from the resolver to digital values to generate the rotation angle signal. The method according to claim 6,
Wherein the obtaining of the first phase difference comprises:
And obtaining the first phase difference using zero-crossing points of the line-to-line counter-electromotive voltage signals and the rotation angle signal. The method according to claim 6,
Wherein the determining step comprises:
And comparing the second phase difference between the first phase difference and each of the line-to-line counter-electromotive voltage signals and the rotation angle signal in the steady state to determine whether the power supply lines are misconnected. 10. The method of claim 9,
Wherein the determining step comprises:
And determining the type of mis-wiring of the power supply lines based on a difference between the first phase difference and the second phase difference.

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