TW546908B - An apparatus for detecting a step-out in a synchronous motor, a method for detecting the step-out in the synchronous motor, a drive of a closed compressor, and a drive of a fan motor - Google Patents

Abstract

This invention provides an apparatus for detecting a step-out in a synchronous motor. In an inverter apparatus for driving the synchronous motor without using a positioning sensor for detecting a position of a rotor, a current detector for detecting a current supplied to the synchronous motor, a d-q coordinate converter for converting a current signal obtained by the current detector into an exciting current component (d axis current) and a torque current component (q axis current), an alternating current component detector for obtaining alternating current components of d-q axes currents obtained by the d-q coordinate converter, and a step-out detector for detecting the step-out by comparing at least one of the alternating current components of the d-q axes currents obtained by the alternating current component detector with a step-out level signal which is set arbitrarily are provided.

Description

6908 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention uses a non-use device to drive synchronization: a machine-based synchronous motor disengagement detection device ί = a motor disengagement inspection method. [Conventional Technology] A diagram of the structure of a conventional converter device. In Fig. 'ΓΤ 2 series converter device, 3 series of multiple switch elements, 3a series U-phase upper f 疋, shut-off parts, 3b series upper-phase Xiaoguan element, & W-phase upper switch element , 3d · phase lower switching element, 3em phase lower switching element, 3f series W phase lower switching element. Series 4 is a plurality of return current two connected in parallel with a plurality of switching elements 3, Series 5 is a main circuit of a converter composed of a plurality of switching elements 3 and a plurality of flow diodes 4, and 6 is a direct current without power. Brush the motor. 7a is a current detection device that detects a current flowing in one phase of the current flowing in the DC brushless motor 6, 7b is a current detection device that detects a current different from the current detection device 7a, and 8 is based on a current detection device 7a The current value detected by 7b controls the converter control settings of the switching element 3 of the converter main circuit 5 on / off. 9 is to generate a pwM signal generating device that can turn on and off the output voltage command value obtained in the converter control device 8 to control the switching element 3 iPWM signal, 10 is to detect from the current detection devices 7a, 7b The phase current computing device that obtains the current value of 3 phases by dividing the current value of 2 phases, which is converted into the current of d — q coordinate system as the current value of 3 phases obtained by 1 current computing device 10 3 phase 2 phase conversion device of dq coordinate conversion device, 12 Page 5 2142-4562-PF (N) .ptd is based on 3 phase 2 phase conversion 相 π soil, π, to find the drive DC cover brush number :: -qff refers to the voltage value of the current command based on the value ί:; ί: d_Q coordinate system output voltage θ 7 value of the rabbit w command value transport device, calculated by f2, The coordinate system's wheel discharge electric dust command value is based on f; it is used to find the output voltage of the output wheel to 1. The output voltage vector tube source is 1 kiji lei thunder skull + taxi — & Yun Yi I set, 1 4 series detection DC over-lightning, six-phase " capable of 1-voltage detection device, 70 series over-current detection device that detects phase current overcurrent and evil. The operation in a DC brushless motor as described above will be described using FIG. 9. In the figure, it changes to: set = earth current detection device 3 to detect the fT phase-divided current flowing into the DC brushless motor ^ current Λ. And using the detected two-phase currents such as the phase current alu and the v-phase current Iv, the converter control device 8 is for driving the DC brushless motor 6 to calculate the converter main circuit 5 by calculation. If the voltage value and the voltage level are equal, the voltage command value is output, and the signal that can be turned on and off to control the switching element 3 2Pwm in the main circuit of the converter 5 is output. The converter control device 8 outputs a signal of ° by the operation described below. The phase current detected by the current detection devices 7 &, 7b. , And the phase current computing device 10 is used to obtain the three-phase divided currents u, u, V,

Iw, and the three-phase divided currents Iu, w are converted into currents Id, Iq of the d-q coordinate system by a three-phase two-phase conversion device. The voltage command value calculation device 12 calculates the output voltage command values Vd * and Vq * in the d_q coordinate '^ by calculating the currents Id and Iq in the d-q coordinate system. The output voltage vector calculation device 13 calculates the output voltage vector Vx * by calculating the output voltage command values Vd * and Vq * from the d-q coordinate system. The PWM signal generating device 9 is

546908 V. Description of the invention (3) DC voltage Vdc and output voltage vector νχ * obtained by 2 measuring device 1 4 can be turned on and off to control the PWM signal of switching element 3 and output it to turn off 2 PWM signal generating device 9 The output PWM signal can turn on the switching element 3 in the actuator main circuit 5. By means of the switch 并: parallel: the main circuit 5 of the second transformer / supplier supplies power to the DC adaptor b and activates the DC brushless motor 6.

V following ί = The disconnection check in the conventional converter device described above is ordered to ί i as usual. In the case where the DC brushless motor 6 is detached, the peak level of the phase current is relatively large during step operation, so _ detachment is detected from this. For example, compare the overcurrent detection t to 7 () to compare: the current value and the overcurrent level. When the current exceeds the overcurrent level, 2 is an overcurrent abnormality, and the disconnection check is performed by the overcurrent abnormality. Here, the overcurrent detection device 70 is composed of hardware or software. Further, another example of the conventional disconnection inspection device of a synchronous motor is disclosed in Japanese Patent Laid-Open No. 11-1899. In the Japanese Unexamined Patent Publication, JP-A-11-4998, the disengagement inspection device for a synchronous motor is described in the controller, which is configured to be set on the rotor so that it can rotate at an estimated speed ωΓ. τ 5 axis, and find the error 0 e from the dQ axis on the rotor. An example of a state estimator that can estimate the r-axis induced voltage and the D-axis induced voltage of Θ e generated as a function of the γ-occupied axis is used to detect the disconnection of the synchronous motor by sequentially comparing the two estimated values. . Further, another example of the conventional disconnection inspection device for a synchronous motor is disclosed in Japanese Patent Laid-Open No. 20 0 1 -2 5282. In this patent

Page 7 V. Description of the invention (4) Kai 20 (No. Π-25282) shows the disconnection check device for detecting the input of the converter device, which is driven by the electric section A, without the sensor and the brushless motor. The period and sum of the voltage. Also, we will show the example of checking the detachment by comparing the two, and the example of checking the detachment and the detachment check level. The d-axis of the current component 】, The conventional synchronous motor's disengagement detection is difficult because it is difficult to construct the disengagement check from the so-called overcurrent phenomenon 22, 2 as above. And: = = state, so it continues to run synchronously with accuracy. In occasions, there are also causes; and the phenomenon of flow separation to separate is: = =: r: The standard is based on the demagnetization resistance of the DC brushless iron and the limit of the electrical components used in the converter device. ;: 2: It is difficult to independently set the detection level used for the detachment inspection. It is difficult to set the detection level for the disconnection check. And because of the combination of the converter device and the brushless DC motor, there are also The current when disengaged is more synchronous If the current is small, it may not be possible to detect the overcurrent based on the above. When the disconnection state is continuous as described above, there will be problems of vibration and noise of the electric rotor. Also, there will be problems The situation H where the device fails due to the effect of the electric d movement, because the current flowing in the J motor becomes larger, which may cause the problem of damage to the ν components used in the converter device. 卞 Conductor element

V. Description of the invention (5) And 'Because of the disconnection inspection of the Yasushi synchronous motor made in Japan, Kaiping 丨 1-1 8499 shows the estimated voltage of the motor's induced voltage. ^ You need a processing load in order to escape from the inspection. increase. t, so it will make the calculations of microcomputers and the like the same: automatic: report: open 2 ° ° " 5282, the period of the voltage disclosed, and the flow in the non-sensing wheel out of the period to check for detachment, household weight Disengagement: In the state of the cycle of the voltage of the brush motor's current and the state of the output of the synchronous electric device, the disengagement check is impossible. And the period of the current is the d-axis current of the excitation current component without phase difference and decoupling, because in comparison by using as the center, the excitation current is based on the number of rotations and the detection level to check the disengagement of the device to operate according to the need. The conditions are different, and the conditions are changed and changed to complex? . (4) The level of detachment check makes the setting because the present invention is made to solve the problem of providing a simplified detachment check, so the step motor can be synchronized with the detachment check and can be used as a synchronous motor with good accuracy. The detachment inspection method is intended as a detachment inspection device, and the purpose is to provide a detachment inspection of a hermetic compressor driven ^ V motor equipped with the above-mentioned device. And the driving device of the fan motor is [means to solve the problem] The disconnection detection of the synchronous motor of the present invention ... The current detection device, which detects the current flowing in the system, includes: Π step motor current; dq coordinate 2112-4562 -PF (N) .ptd $ 9 page 546908

V. Description of the invention (6) The conversion device converts the current signal obtained by the current detection device into coordinates of the exciting current component (d-axis current) and the torque current component (Q-axis current); The current AC component detection device obtains d -AC component of the dq-axis current obtained by the q-coordinate conversion device; and a detachment inspection device that compares at least any one of the d-q-axis current AC components obtained by the current-AC component detection device with any set off-level signal and checks Break away. Moreover, the characteristics of the disconnection inspection device of the synchronous motor of the present invention include: a current detection device that detects the current flowing in the synchronous motor; a coordinate conversion device that converts the current signal obtained by the current detection device into a coordinated current component (d-axis) Current) and torque current components ((1 axis current); current AC component detection device to obtain the AC component of the dq axis current obtained by the d-q coordinate conversion device; AC component averaging device to find the component of the current parent current The average value of the d-q-axis current AC component obtained by the detection device is an average value of the effective value or the absolute value of the d-q-axis current AC component; and the dq obtained by the AC component averaging device is compared with the detached inspection device At least any one of the average values of the shaft current AC components and any set disengagement level signal are checked for disengagement. The characteristics of the disengagement inspection device of the synchronous motor of the present invention include a current detection device that detects the flow in the synchronous motor Current; d — q coordinate conversion device, which will be obtained by the current detection device The current signal is transformed into the exciting current component (d-axis current) and the torque current component ((1-axis current); the current error calculation device calculates the current between the d-q position obtained by the d-q coordinate conversion device. Error of dq coordinate current command value; current component AC component detection device detects d-q-axis current error obtained by current error calculation device

V 546908 Five daggers, description of the invention (7) — _ poor AC component; and a detachment inspection device, comparing at least any ^ / 1 square of the AC component of the dQ axis current error obtained from the current error intersection, ☆, and sub-detection devices Check for disengagement with any set disengagement level signal. Yes — Moreover, when the detachment inspection device of the synchronous motor of the present invention detects an AC component from a d-q coordinate system current, it is a frequency component. The specific details are detailed. Furthermore, the detachment inspection device of the synchronous motor of the present invention ^ uses a specific frequency component to make the ^ characteristic output by the converter device 2 times the frequency. In addition to the frequency of the electric double, the disconnection detection of the synchronous motor of the present invention is to detect the frequency component of the AC component of the current component of the d-q coordinate system error. T /, detection specific Furthermore, a characteristic of the vibration separation of the synchronous motor of the present invention compared with the average value of the Q-axis current AC component is about 200% of the rated current of the synchronous motor. This method is suitable for the situation and the situation that the disconnection check of the synchronous motor of the present invention is difficult during low-speed rotation. The feature of the checking device is to accelerate to a fixed number of rotations to perform the disconnection. Inspection of the invented synchronous motor. When the acceleration and deceleration of the synchronous motor is performed, it is possible to check the characteristics of the system, and the error is detected during the acceleration process.朿 Execution from the inspection area. Current of motor;

Page 112112-4562-PF (N) .ptd Moreover, the same motor of the present invention includes: a current detection device, a detection flow in :: the characteristic system of the inspection device 546908 V. Description of the invention (8) Voltage command calculation The device calculates the output voltage command value applied to the synchronous motor based on the current signal obtained by the current detection device. The output voltage vector calculation device determines the output voltage based on the output voltage command value obtained by the output voltage command calculation device. Vector; output voltage abnormality detection device, which compares the magnitude of the output voltage vector obtained from the output voltage vector calculation device with the detachment check level; and detachment check device, which checks the detachment with the comparison result obtained by the output voltage abnormality detection device. The method for checking the disconnection of the synchronous motor of the present invention includes: a current detection step for detecting a current flowing in the synchronous motor; a dq coordinate conversion step for converting the current signal obtained from the current detection step into a coordinate to generate an exciting current component (d-axis current) ) And the torque current component (q-axis current); the current AC component detection step to find the AC component of the dq axis current obtained from the d-q coordinate conversion step; and the detachment check step to compare the dq obtained from the current AC component detection step At least one of the shaft current AC components and any set disengagement level signal are checked for disengagement. In addition, the method for checking the disconnection of the synchronous motor of the present invention includes: a current detection step for detecting a current flowing in the synchronous motor; a dq coordinate conversion step for converting a current signal obtained from the current detection step into a coordinate to generate an exciting current component (d Axis current) and torque current component (q-axis current); current AC component detection step, to obtain the AC component of the dq axis current obtained from the dq coordinate conversion step; AC component averaging step, to obtain the current AC component detection and installation step The average value of the effective or absolute value of the AC component of the dq-axis current is obtained, and the AC component of the dQ-axis current is averaged; and from the inspection step, the step of averaging the AC components is compared.

2112-4562-PF (N) .ptd Page 12 546908 V. Description of the invention (9) At least one of the averaged values of the d-q-axis current AC components and any set off-level signal are checked. Break away. In addition, the method for checking the disconnection of the synchronous motor of the present invention includes: a current detection step for detecting a current flowing in the synchronous motor; a dq coordinate conversion step for converting a current signal obtained from the current detection step into a coordinate to generate an exciting current component (d Axis current) and torque current components (q-axis current); current error calculation step to find the difference between the dq coordinate current obtained from the dq coordinate conversion step and the dq coordinate current command value; current error AC component detection step to detect the current error The AC component of the dq-axis current error obtained by the computing device; and the detachment checking step, comparing at least one of the dq-axis current error AC component obtained by the current error ac component detection step and any set detachment level signal to check for detachment. Furthermore, the method for detecting the disconnection of the synchronous motor of the present invention is characterized in that when detecting the AC component from the d-q coordinate system current, only a specific frequency component is detected. Further, the method for checking the disconnection of the synchronous motor of the present invention is characterized in that a specific frequency component is a frequency which is twice the frequency of the voltage output from the converter device. Furthermore, the method for detecting the disconnection of the synchronous motor of the present invention is characterized in that when detecting the AC component from the d-q coordinate system current, only a specific frequency component is detected. Further, the feature of the method for checking the disconnection of the synchronous motor of the present invention is that the level of the disconnection check compared with the average value of the AC component of the q-axis current is about 200% of the rated current of the synchronous motor.

2112-4562-PF (N) .ptd Page 13 546908 V. Explanation of the invention (ίο) Moreover, the synchronous electric motor of the invention ',-' is difficult to detach from the inspection at low speed, and the characteristics of the inspection method are accelerated to fixed The number of rotations is up to the time; j Z, and immediately after starting, the synchronous motor 2 of the present invention is checked. When the acceleration and deceleration of the synchronous motor is performed, and the characteristics of the inspection method are not possible, the acceleration and deceleration should be performed. The disconnection check is performed externally. Furthermore, the disconnection of the synchronous motor of the present invention includes a current detection step, which detects the characteristics of the flow in the inspection method. The voltage command operation step is to detect the current by the current; The output voltage of the synchronous motor is equal to the current semaphore calculation step 'Based on the output voltage command d: The output voltage is calculated based on the command value to obtain the output voltage vector; the output voltage vector is compared to the output voltage vector. [Operation step = electricity] 2 steps: small and detachment check level; and detachment check step, "comparison of the results obtained from the electrical detection step to check detachment.] The output voltage differs from the drive device of the hermetic compressor of the present invention. For features, please refer to the same ionization inspection device as described in any one of item 10 of the scope of the patent. 4〆Disengagement of the electric motor The characteristics of the drive device of the fan motor of the present invention are as described in item 10 of the scope of the utility model Synchronous motor according to any one of the following: the inspection device. ~ Muscle_Examination [Embodiment of the invention]

546908

Hereinafter, embodiments of the present invention will be described based on the drawings. Embodiment 1. Fig. 6 is a diagram illustrating Embodiment 1, and Fig. ^ Shows the structure of the converter device. Fig. 2 is a diagram illustrating various waveforms during synchronous operation, and Fig. 3 is a diagram illustrating various waveforms during disconnection. Figure, Figure 4 is a flowchart of the disconnection check process. Figure 5 is a diagram illustrating various waveforms at the time of disconnection, W6 #, disconnection check ^ In Figure 1, 1 is a DC power supply section, 2 is a converter device, and 3 is a series A plurality of switching elements, 3a is a phase-phase upper switching element, 3b is a ¥ -phase upper switching element, 3c is a W-phase upper switching element, 3d is a 0-phase lower switching element, and 仏 is a V-phase lower switching element. Boundary phase lower side switching element. 4 is a plurality of return current diodes connected in parallel with a plurality of switching elements 3, 5 is a circuit composed of a plurality of switching elements 3 and a plurality of return diodes 4, and 6 is a brushless DC motor. ° Electricity 7a is a current detection device that detects the current of one of the phases flowing in the DC brushless motor 6, and 7b is a detection and current detection device. It is a current detection device for currents of different phases. 8 is a converter control device that controls the switching element 3 in the converter main circuit $ based on the current value detected by the current detection devices 7a, 7b. 9 is a pwM signal generating device capable of controlling the switching element 3 < pWM signal by turning off the output voltage command value m obtained in the converter control device 8, and is detected by the current detection devices 7a, 7b The phase current computing device i, which calculates the current value of 2 phases by 3 phases, is used to convert the current value of 3 phases obtained by the phase current computing device 1 () into a block.

2112-4562-PF (N) .ptd Page 15 546908 V. Description of the invention (12) The three-phase two-phase conversion device of the dq coordinate conversion device of the current value of the standard system, and the 12-phase two-phase conversion device U电流 The current value of the coordinate system is based on the calculation of the set value that can drive the DC brushless motor. The 13 series is based on the command value calculation device of the power plant. Ί: ί: The output voltage command value of the 5 coordinate system is based on * Ϋ Λ voltage vector computing device, 14 is a DC voltage detection device that detects the & voltage of the DC power supply 1. Measure the d-q coordinate system obtained by the 3-phase and 2-phase conversion device n to measure the electric and AC component detection device, and 16 series compare the AC component of the d_q coordinate system of the current component and the d_q coordinate system to determine the separation. Check off the inspection device. The operation of the converter device constituted by # & ϋ b ^ ^ ^ will be described using FIG. 1. In: DC benefit; U is the current detection device 7a, 7b to detect the current flowing through the Γ phase, the eight lightning ^, Γ phase current of 2 phases. Using the tested braid, the ancient € 77 / melon, the column is U-phase current Ϊ 11 and V-phase current IV, and the k-current converter control device 8 is used to calculate the converter main circuit = up to 6 and calculate by The electric signal is commanded, and the signal of the switching element 3 which can output the electric gate and voltage phase is output. Off to control the converter main circuit 5. The internal device main == the output signal of the generator 9 can make the converter 3 to be controlled by on / off. The DC brushless motor 6 is driven by supplying power from the converter main circuit 5 to the DC brushless motor 6. And by selecting the dq coordinate system current selected from the three-phase two-phase conversion device 11, 546908 V. Description of the invention (13) ----- ~ ^ 1 d, ^, 'Parent machine component detection device 1 5 series detects dq coordinates System current I d,

The father of Iq ^ Id —AC, Iq ~ AC. The AC component detection device 15 compares the d-Q coordinate system with the AC component 1 (1 —Ac, one ...) and the deviation check level Error-Level, and sets Η — — to exceed the deviation check level

In the case of Error-Level, an abnormal stop signal is output as a break. When an abnormal stop signal is output from the AC component detection device 15, the PWM signal generating device 9 outputs a signal that can completely turn off the switching elements 3 in the main circuit of the converter 5 and stops the main circuit 5 from the converter. Power supply to the DC brushless motor 6. At the same time, the converter control device 8 is operated. Next, the details of the detachment inspection method according to this embodiment will be described with reference to Figs. 2 and 3. The waveform diagram shown in FIG. 2 is an example of various waveforms when the brushless DC motor 6 is normally operated in synchronization. In FIG. 2, waveform (a) is a phase current waveform I u obtained from the current detection device 7 a, waveform (b) is a d-axis current waveform Id obtained from a three-phase and two-phase conversion device, and waveform (c) is from The (j-axis current waveform iq, waveform (d) is the AC component waveform Iq_AC of the ^ -axis current Iq obtained by the 3-phase 2-phase conversion device. The waveform shown in Figure 3 shows various waveforms when the DC brushless motor is disengaging. For example, in FIG. 3, waveform (a) is the phase current waveform I u obtained from the current detection device 7 a, and waveform (b) is the d-axis current waveform I d obtained from the three-phase and two-phase conversion device. c) is the q-axis current waveform Iq obtained from the three-phase and two-phase conversion device, and waveform (d) is the AC component waveform Iq-AC of the q-axis current Iq. As shown in Figures 2 and 3, if the DC brushless Motors run synchronously

2112-4562-PF (N) .ptd Page 17 μ 08 08 V. Description of the invention (14) Energy =: q coordinate system current 1d, the system almost becomes DC, but when opening / closing, AC components are generated in Id, 1 (1. As shown in Fig. 3, the wave is divided into eight Tn to separate the check level Erroor-Level to compare the intersection of Id and Iα: -Ac, Iq-Ac, in which case it is used as a break. It is possible to check the disengagement by moving it. ^ ^ The phenomenon of the AC component generated by IC1 at 1 d is below ft. Especially when the inductance of $ axis and Q axis is like IPMSM (Built-in magnet synchronous motor) In different motors, the two are held in synchronous operation, and the relationship between the rotor phase and the output voltage phase of the converter is poor, that is, the phase difference between the output voltage of the converter In the case of the reference, when the inductance of the d-axis and q-axis of the rotor is constant, the motor I d and the shaft current I q are almost DC. On the one hand, it is for the rotor phase and the change in the separation from the large t. The relationship between the phase of the output voltage of the converter can be changed frequently, that is, the phase of the output voltage of the converter can be changed. When the bit is used as the reference, the inductance of the d-axis and q-axis of the rotor will change constantly, and the shaft current Id and shaft current Iq will change with each rotation phase, and j will generate AC components. The AC component of the d-q axis current is detected, and the change in the inductance of the d-axis and q-axis of the rotor (rotating state of the rotor) seen from the output voltage phase of the converter can be captured, thereby detecting the synchronous motor's Disengagement. ', Figure 4 is used as the disengagement inspection device in the first embodiment.

=, Especially used to explain the device that uses the wheel equivalent to the current flowing into the motor to the q-axis current I q of 1 component. Fig. 4 is a flowchart showing the flow of the detachment inspection process. In Figure 4, STP1 is the process of detachment check, STp2 ^ IL

2112-4562-PF (N) .ptd 546908 V. Description of the invention (15) Phase current detection processing, STP3 series phase current calculation processing, STP4 series 3 phase 2 phase conversion processing, STP5 series AC component detection processing, STP6 series disconnect Level comparison processing, STP7 series PWM stop processing, STP8 series exception processing, STP9 series complete processing normally.

The flow of the disengagement inspection is as follows. Starting from STP1, the inspection process is started, and the phase current detection process of STP2 is used to detect the two-phase divided currents Iu, Iv flowing into the DC brushless motor 6 from the detection current detection devices 7a and 71). The currents Iu, Iv, and Iw divided from the three phases are calculated by the phase current calculation processing of STP3. In the three-phase and two-phase conversion process of STP4, the three-phase currents I u, I v, and I w obtained in STP 4 are converted into d-q coordinate system currents I d and I q. In the AC component detection process of STP5, a high-pass capacitor is used to detect the AC component Iqjc of the q-axis current Iq obtained in STP4. In the comparison of the deviation level of STP6, the q-axis current AC component Iq — AC obtained from STP5 is compared with the deviation level Error —Level, and in the case of iqjC-Error —Level, it is regarded as the deviation and proceeds to 31 ^ 7. In the case of IqjC < Err or One Level, it advances to STp9 during synchronous operation. In the PWM stop processing of STP7, when the STP6 judges that it is disconnected, the PWM signals output by all the PWM signal generating devices 9 are regarded as the stop & state,

Then, the operation of the converter control device is stopped. In the abnormal completion processing of $ T p 8, the detachment check is performed as a detachment exception. However, in STpg's normal completion processing, it is regarded as a normal operation and the detachment check processing is completed. As described above, by detecting the change of the dQ-axis current generated during normal operation and off-time, the DC brushless motor can be detected to make it more accurate than the conventional overcurrent phenomenon. Out of inspection

546908

Moreover, because the output vector component corresponding to the current flowing into the motor, the q-axis current Iq is proportional to the output vector, so it has the possibility of checking the detachment at the q-axis current and causing erroneous detection. Here, the detection of the intersection of I q can be performed with better accuracy even under the condition that the output vectors are different. In addition, since it is a variable used in the calculation of the output voltage designation value in the converter control device 8, the devices such as the induced voltage estimation device are unnecessary, and the check-out process can be simplified.

Next, another configuration of the first embodiment of the detachment inspection device for the synchronous motor according to the present invention will be described with reference to Fig. 5. Here, the configuration of the converter device is the same as that of FIG. 1. The waveform diagram shown in FIG. 5 is an example of various waveforms when the DC brushless motor 6 is being disengaged. In the figure, 'waveform (a) is a phase current waveform obtained by the current detection device 7a, u, waveform (b) is a d-axis current waveform Id obtained from a three-phase and two-phase conversion device, and waveform (c) is a three-phase The q-axis current waveform Iq obtained by the 2-phase conversion device, the waveform is the AC component wave BhjC of the q-axis current Iq, and the waveform (e) is the rectified q-axis current AC component I q — the AC-axis absolute value waveform of the q-axis current | I q-AC | 'waveform (f) is a low-pass filter to filter out the ^ axis current AC

The absolute waveform IqjCjii. As shown in Figures 2 and 5, if the DC brushless motor is in a synchronous operation state, then the d-q coordinates 糸 the currents I d and I q are almost DC, but when they are out of the state, an AC component is generated at I d, I q. As shown in the waveform (f) of Figure 3, the low-pass filter is used to compare the error level with the error check level.

2112-4562-PF (N) .ptd

546908 Five Invention Description (17) Filter to filter the waveform of the absolute value of the AC component of Id and Iq "

Iq_AC__Fi 1 and can be checked for disengagement if the action of this person exceeds 1 1 '. It is wrong to use FIG. 6 as one of the disengagement checking devices, and to use a device that is equivalent to the output of the current flowing into the motor. Fig. 6 is a drawing knife showing the flow of the detachment inspection. In the q-axis current, STP1 is out of the inspection process, STP2 is the phase. Figure 6 sm is the phase current calculation process, and the 4 is the 3 phase and 2 phase rotation. AC component detection processing, STP10 series rectification (absolute value calculation) processing series ST P1 1 series filtering processing based on low-pass filter, s τ p 1 2 series out of position, more processing, STP7 series PWM stop processing, STP8 series abnormal Processing, S1 ^^ completed processing than normal. The flow of the disengagement check becomes as follows. Starting from STP1, the inspection process is started, and the phase current detection process of STP2 is used to detect the two-phase divided currents Iu, Iv flowing into the DC brushless motor 6 from the detection current detection devices 7a and 7b. The currents Iu, Iv, and Iw divided from the three phases are calculated by the phase current calculation processing of STP3. In the three-phase two-phase conversion process of STP4, the three-phase currents I u, I v, and I w obtained in STP4 are converted into d-q coordinate system currents I d,

Iq. In the AC component detection process of STP5, a high-pass capacitor is used to detect the AC component I (l-AC of the q-axis current Iq obtained in STP4. In the rectification (absolute value operation) process of STP10, the rectification obtained in STP5 is used. q-axis current AC component I (I-AC and find the absolute value of IQ-AC |

Iq —AC |. The STP11 filtering process will use 1q-AC 丨 to perform filtering using a low-pass filter to obtain the absolute value of the AC value of U.

2112-4562-PF (N) .ptd Page 21 546908 V. Description of the invention (18) IQ-AC-Fi 1. Comparison of the off-level comparison device at STP12

Iq_AC — Fil and Error_Level, *; ^ iq Acp ·

In the case of Error —Level, it is detached, and it advances to STP7 Γ. In the case of 1 1 ^ Iq_AC_Fil <Error — Level, it is used as synchronous operation; STP9. In the PWM stop processing of STP7, when STp6 judges T to enter the situation, it will stop the output state of the signal generator 9 and further stop the converter control device. The abnormal completion processing is two. The middle system is completed as a departure abnormality. The normal completion process of ^ ^ is completed as a positive f action. The separation is completed as described above by detecting the "shaft current change of the lower shaft". Turn, check. Once a better-precision disengagement check is made, and because the input q-axis current I q corresponding to the current flowing into the motor is proportional to the knife level in the output vector p, when checking for disengagement, ; ^ Simply set the disengagement level based on the current of the q axis and it becomes a complex load. The implementation of the condition of the torque is similar to the detection of the two components.:, &Quot; And, if the issue is a different condition It can also be accurate to 1 flow cent, even if the output vector is the same as the detachment check to perform the detachment check. Because the d-axis current value is also changed due to the d-axis current value, the machine's operating conditions change, So get it Synchronous motor load torque current of the field to check the level of Bt-known people from camel embodiment simply in order to keep the q-axis ° 'according to the rotation number and the load torque

2112-4562-PF (N) .ptd P.22 Here is an example of setting the separation level for comparison during the separation check. And even if (the AC component of the 1-axis current, the AC component, q-Ac is in a synchronous operation state, it will be generated due to the change of the load torque, etc. However, the following description will deviate from the set value of the level 546908 V. Conditions of the invention (19) However, it is necessary to set the disengagement level, which becomes a complicated structure. However, as in the implementation of the present invention, the AC point of I d can be detected similarly, and the accuracy can be better even under the condition that the synchronous motors have different operating conditions. In addition, since the variable used in the calculation of the output voltage designation value is used in the converter control device 8, the devices such as the induced voltage estimation device are unnecessary, and the separation check processing can be simplified. Also, take the absolute value of the AC component IqjC of the q-axis current |

Iq-AC | will use a low-pass filter to filter out its value Iq —AC —Fi i to use it for detachment inspection. The accuracy of detachment inspection can be improved by the following points. Due to sudden load torque fluctuations or DC power supply 1 voltage fluctuations, the AC component of the q-axis current I q — Ac may temporarily increase even when it is not in a disconnected state, but IqjC-Fil is used for disconnection inspection. It is possible to avoid erroneous detection due to the detached state due to the aforementioned state. However, because the level of [qjC generated in normal time is smaller than the level of Iq-AC generated in detachment, the setting level can be larger than the level of Iq-AC generated in normal time. It is smaller than the level generated when leaving. It is easy to set because there is a big difference between the Iq — A (: generation level at the time of departure and the time of departure. 脱离 夕 啻 ,, 古, ^ ^ ^ 1 ~ w 珂 π stomach; ^ ί &quot; IL is 〇 5 A DC brushless motor when disengaged

2112-4562-PF (N) .ptd Page 23 546908 V. Description of the invention (20) The q-axis current 1 (the average value of the AC component of 1 lQ jC —Fil level is rated within the rated operating range The effective value of the current is less than 50%, and the average value of the AC component of the Q-axis current generated at the time of detachment q—AC—F i 1 is within the rated operating range of less than 250% of the rated current effective value. Here, considering the influence of the moment 2 variation and the DC voltage variation, it is possible to consider the device amount, 200% of the electric value &amp; effective value as a device for deviation from the inspection level, etc. In addition, the following explains the setting of the deviation level Another example is the compressor used as a step motor load, especially if the load change during single-rotor pressure rotation is large *, the current on the q axis is caused by the torque ripple caused by the load fluctuation The AC component I ^ _AC generated by Iq becomes slightly larger, but the Iq_AC system at the time of separation is not so large. Compared with the general book, the separation inspection level can be set larger. In the separation inspection method shown in the first embodiment of the change iin , Because the combination of ^ '2 &quot;, and brushless DC motor can Make idle flow at low speed =: you 2 current becomes smaller, the household weight is away from the inspection at low speed. The inspection system has a shovel I: In this case, it can be detected immediately after the start of the test to accelerate the fixed action. This •, to Until the test, the disconnection state is determined to be the operating day; because: the time is several seconds, and the current flowing is also less than the amount] ",,,,, so the adverse effects on the converter and synchronous motor are several standards Current id3i == In the case of a brush motor, there is a possibility of erroneous detection of the d'q seat ^ component, which may lead to the wrong check processing of the detachment check, and in the case of / acceleration and deceleration, the detachment check is not performed and the speed is reduced It can be detected outside the process.

546908 V. Description of the invention (21) Frequency of 2 times of the frequency of the electric voltage of the electric power. \ This ^ / cause ^ is the dQ coordinate system when the converter device is turned off and off. ^: For example, when the motor has a fixed number of poles from the pole number m, although y 4 is clear about the implementation of t,, and methods. The q-axis current value I w. # y. The separation of the inspection method makes the q-Hirata electric value grasp the value, but even if you use ^ rainbow, the error between the command value and the d-axis current, q, and machine value The d-axis current finger, the left and the q quarters are determined by the current command value plate α fine thunder, and the difference between the six &gt; can also perform the same detachment check. Here, the error value of ^ ^ and the q-axis current command value are in the order of χ m motion_u electrical ^ command = ground control synchronous motor, i is the value determined by motion as the operating condition. % Of the motor When detachment check is performed using the d-axis current command value and (the error of the 1-axis current and the error of the q-axis section command value and the q-axis current), find ^ as the phase current calculation device. The 3-phase current value obtained in 10 is converted into d-q coordinate system current value. The dq coordinate conversion device in 3-phase 2-phase conversion device 11 obtains the error between the dq coordinate system current and the dq coordinate current command value. The AC component of the obtained dq-axis current error is compared with at least any one of the detected AC component of the d-q-axis current error and any set deviation level signal to check the deviation.

2H2-4562-PF (N) .ptd 546908 V. Description of the invention (22) When the q-axis current value is used in the case of detachment inspection, the q-axis is cold when the vector component of the current flowing in the synchronous motor is used. Therefore, in the case where the ^ series current value has a large AC component, it is a situation where the wheel power of the motor changes greatly, which is equivalent to a situation where the operation is abnormal. Torque Here, even in the fixed operation, the q-axis current due to the load torque generates AC components, but it is more than the AC component generated when it is disengaged. As mentioned above, the change in the q-axis current is related to the motor ^. In order to easily distinguish between normal and detached. Therefore, the device used for the separation check facilitates the setting of the separation level and the like. When the d-axis current is used for the detachment inspection, the AC current component is generated during the detachment when the current flow is the same as the q-axis current, and the d-axis electric axis current becomes the feasible detachment inspection. ) Knife, so with q, and using both the d-axis current and {1-axis current, the field person $ hunting by multiple pieces of information to check the detachment can improve the detachment factor ^ Use the peak current and Q-axis current values and use Coordinates: It is the same in the case of using 2 &quot; &quot; for conversion to at least one day other than d-axis current or q-axis current. The measured amount of 1 solid is that the d-axis current and q-axis current are in the direction of a magnetic pole from the d-axis to the rotor of the rotor Han and the ㈣Λ motor. And ☆, the meaning of the position sensor to drive a synchronous motor is q: The coordinate system 'Although there is an axis equivalent to the 9-axis control of Yoshito = t-axis', and the relative coordinate system can also be n # AA collision slip ^ ren don't need to, even if it is 5 7 axis ^ j U ^ Make it happen. 7 poles by

2112-4562-PF (N), Ptd See

Page 546908

V. Explanation of the invention (23) The absolute AC component of the flow component is equal to the d ~ q axis current. In the above embodiment, the dq axis current is obtained when the d ~ q axis current is averaged. The AC value and the average value of the dQ-axis current can be obtained by filtering the absolute value of the AC value, but the average value of the AC component can also be obtained. Implementation form two. Garden ί. Yang Gang didn't tell him that he was able to win a solid battle. Fig. 7 is a diagram of the structure of the display device, and Fig. 8 is a household that is separated from the inspection process and a rebirth knife. 1 is a DC power supply unit, 2 is a converter device, and 3 is a series. Plural 2 α

Parts, 3a series U-phase upper switching element, 3b series ¥ phase upper switching element #, δ 'phase upper switching element, 3d series 1] phase lower switching element, 3e series V phase, c / switching element, 3f series W phase Lower switching element. The 4 series is connected to a plurality of meshes / side 3 and is connected to a plurality of return current diodes, and the 5 is a plurality of return current diodes; =; the component 3 and the plurality of return current diodes 4 constitute a main converter. Brush the motor. ^ 6 # i

7a is a current detection device that detects the current flowing in one phase of the current flowing in the DC brushless motor 6, 7b is a current detection device that detects the current of a different phase from the current detection device, and 8 is based on the current detection device 7a, The current value detected in 7b controls the converter control device of the switching element 3 in the converter main circuit 5 by turning on and off. ^, So that the output voltage obtained in the converter control device 8 can be generated to be two = a PWM signal generating device that controls the PWM signal of the switching element 3 on / off, '1 0 is from a current detection device The phase current calculation device for the electric current value of 2 phases detected by 7a and 7b to obtain the current value of 3 phases.

Page 27 546908 V. Description of the invention (24) The three-phase current value obtained by the phase current calculation device is converted into a d-q coordinate system current value of the three-phase two-phase conversion device. 2 It is a voltage command value calculation device that calculates the output voltage command value of the d_q coordinate system that can drive a DC brushless motor based on the current value obtained from the three-phase two-phase conversion device n. The voltage command value calculation sets an output voltage vector calculation device based on the dq coordinate system output voltage command value obtained from 12 to obtain a voltage vector, and 14 is a DC voltage detection device that detects the direct voltage of the DC power supply 1. μ J7 * is a big ratio] The output voltage obtained by the voltage vector operation device 13 goes straight to the size of Vx * | VxM and the detachment check bit 1 input, the voltage abnormality detection device, 18 is from the output voltage abnormality detection two. The comparison result of 17 is used to check the detachment, and FIG. 7 is used to explain that the above-mentioned sincerity α μ appears to be a piece of clothing. In the figure, the converter device 2: The dynamic measurement of the converter device flows into the phase of the DC brushless motor 6 and the detection device U detects the detected two-phase current, such as the morning two-phase The current. Let IV, and the converter control device 8 is: the eye current IU and V phase current are calculated by the converter main circuit 5 = the DC brushless motor 6 borrows the output voltage command value, and the output can be output. The voltage value and voltage phase are equal to the ρψM signal of the switching element 3 in the circuit 5. The switch controls the main power of the converter. In the converter control device 8, the PWM signal is used. By outputting I and I ν by the action of the δ self-loading of the current detection device, the phase currents Iv and Iw detected by the phase current computing device a 7 b and the three-phase current Iu \ T 〇 can be obtained. The three-phase currents IU, v, and I w are obtained through a three-phase and two-phase conversion device 546908. V. Description of the invention (25) "1 = 1 is replaced by the currents Id, iq of the d_q coordinate system. The voltage command value operation 々 Ϊ calculates the outputs d Λ *, VQ * from the currents Id and Iq of the d-Q coordinate 糸. The round-out voltage vector calculation 13 sets the output voltage specified value from the output Λ 糸 1, ..., ¥ to calculate the output by calculation =: X The PWM signal generating device 9 is based on the DC voltage detection: to open the second switch The pWM signal of the switching element 3 is controlled and rotated out. The pWM believers output by Pei Chi 9 generated by the PWM signal: Master! The output voltage vector computing device 13 in the circuit 5 is turned on. The main circuit 5 of the output voltage vector computing device supplies power to the inverter in a wrong manner: the off-line operation can be performed by a variable-current brush motor. ",,, and i brush the motor 6, and the drive DC is not connected to the output voltage abnormality detection device 17 by the output voltage vector arithmetic device 3 ;;;; = 2 vectors VX * Vx * I, among which will be able to disengage The quasi v—Err〇r—Levei is less than the situation below the level I_V_Error_Level as the detachment.—And again when the detachment exceeds the detachment level V_Error —Levelm is equal to = if it is turned. When the output voltage abnormality detection Vx I is below the disconnection level v_Error_Level in the disconnection checking device 18, if the PWM signal generating device 9 receives an abnormal stop n when the signal is received, the output will be converted as a disconnection. The switch in the main circuit 5; the signal in the case of J, and the operation of the switching element is stopped. Moreover, the shutdown also stops the operation of the converter control device. ",,,, and simultaneously

546908

V. Description of the Invention (26) An example of the flow of the separation inspection process in the second embodiment will be described with reference to FIG. 8. FIG. 8 is a flowchart showing a processing flow of the departure check. In Figure 8, STP1 is the start of the disconnection check, STP13 is the round-out voltage vector detection process, STP1 is the output voltage vector size detection process, STP15 is the off-level comparison process, STP7 is the PWM stop process, and STp8 ^ The processing is completed abnormally, and the STP9 series finishes processing normally. μ starts to leave the inspection process at STP1, and uses the output vector detection process of STP13 to detect the round-out voltage level Vx * obtained by the output voltage vector computing device 13 and calculates the size of the output vector of STP14 at STP13. The magnitude of the detected output voltage level Vx * | Vx * |. In the 81 ^ 15 off-level comparison process, the magnitude of the output vector is compared | Vx * | and the off-level V — Error_Level. In the case of | Vx * | &lt; V —Error —Level, the process proceeds to STP7 as a detach. . On the one hand, in the case of | Vx * I &gt; V-Err or -Level, it proceeds to STP9 as a normal synchronous operation.

When the STP's PWM stop processing is performed when STP6 determines that it is disengaged, all the PWM signals output by the PWM signal generating device 9 are in a stopped state ', and the operation of the converter control device is stopped. The abnormality completion processing in STP8 is performed as a detachment abnormality to complete the detachment check. The normal completion processing of STp9 is performed as a normal operation to complete the detachment check processing. When the DC brushless motor is driven, in order to continue the synchronous operation, if it is under the necessary output voltage, the synchronous operation cannot be continued and the disconnection occurs. This phenomenon can be used to check for detachment. This check &amp; is implemented in the operation shown in the second embodiment. Here, because according to the

2112-4562-PF (N) .ptd Page 30 546908 V. Description of the invention (27) ------ = the size of the output voltage vector ÷ νχ * The V-Error-Level is different according to the operating conditions Set it. Bit 5: The ground described above can be detected by detecting the DC brushless motor by detecting the normal synchronous operation 蛊 =; vector IVx * I, and the separation can be done with better accuracy. Because it is used in the calculation of the normal voltage command value ::;: used in the round * and so on; set, it can simplify the synchronous automatic implementation of the voltage estimation device without checking processing-and implementation of the second The permanent magnet synchronous electric brush motor is taken as an example, but needless to say, the same effect can be obtained. 5v reluctance motors and switched reluctance motors are examples of the problems of the present invention. For example, there may be a device for freezing and storing the inspection device. Compressor noise generated by the wear-reduction drive of the I-reduction drive device Zang blender, ο is used in the place where people leave the motor rotor :::::: 2 refrigerant piping :: High reliability Cold Ling refrigerator :; Second: the title ..., can ;; as the π i of the present invention is the β cycle and machine. Hearing-For example, the disengagement inspection device of the A-22 motor can be cited. It is generated when it is installed in the refrigerator and the air conditioning equipment = motor drive device, and the fan motor noise and n J generated by the motor drive seat are improved after the separation ~~ and due to the fan motor vibration Peng 2112- 4562 ~ PF (N) .ptd Page 31 546908 V. Description of the invention (28) Demagnetization of magnets used in rotors or electric motors, or damage to semiconductor components of converters installed due to increased current, etc. Therefore, it is possible to realize a high-reliability freezer refrigerator and an empty blender. [Effect of the invention] The detachment inspection device of the synchronous motor of the present invention includes: a current detection device that detects the current flowing in the synchronous motor; a d_q coordinate conversion device, and the coordinates of the current signal obtained by the current detection device are converted into the exciting current. Composition (d-axis current) and torque current

Current AC component detection setup to find the J-axis current component from the "coordinate conversion f: :); and a detachment inspection device that compares at least one of the d_q-axis current AC components obtained by the current AC component detection device with Check the detachment arbitrarily with the detachment level signal, and with a simplified structure, you can check the detachment with good accuracy. Moreover, it can prevent the detachment state from being caused by the spine + 内 $ 斑 #, α The demagnetization and current increase of the magnet within a thousand turns i = the destruction of the main circuit components of the device. Moreover, it can prevent the noise and vibration of the synchronous motor caused by the continued detachment. • Also, the present invention The detachment inspection device of the synchronous motor detects electric current flowing in the synchronous motor by including an electric μ nuclear test device; the d-q ^ standard conversion device converts the current signal obtained by the current detection device into an exciting current component. (D-axis current) and torque current component (q-axis electrical voltage), electrical / mechanical component detection device, find the AC component of the d_q-axis current obtained by the d_q coordinate conversion device AC component averaging device, finds the average value of the effective value or absolute value of the d-q-axis current AC component obtained by the current-AC component detection device, and gives the d_q-axis current AC component

2112-4562-PF (N) .ptd

(Page 32) 46908 V. Description of the invention (29) t homogenization; and a separation check device, comparing at least any one of the average values of the q-axis current parent current component by the AC component averaging device with any two ^ ° In addition, it is possible to check the detachment based on the detachment level signal, and to check the detachment with good accuracy. In addition, because a flat pull is used as the detection value ', it is possible to prevent the erroneous detection due to the load force or voltage fluctuation of the synchronous motor. In addition, it is possible to prevent the reduction of the magnets in the rotor of the synchronous motor due to the continuous occurrence of the i-shaped evil. . Damage to the main circuit components of the converter caused by an increase in current. Moreover, L ^ stops the noise and vibration of the synchronous motor caused by the detachment. In addition, the 'separation inspection device of the synchronous motor of the present invention detects the current flowing in the synchronous motor by using the Baoguang current detection device'; dq = conversion device, and converts the current signal obtained by the current detection device to the exciting current component. U-axis current) and torque current components (Q-axis electric current error calculation device, find the error between the coordinate current obtained by the dq coordinate conversion device and the command value of the dq coordinate current; the current error is detected by the AC2. The error obtained by the error calculation device, the axis of electricity &lt; the father of the difference &quot;, L becomes, and the separation check device compares at least any one of the d-q-axis current error AC components obtained by the current error intersection = j-point detection device with The detachment level signal is arbitrarily set to check the detachment, and with a simplified structure, the detachment can be checked with high accuracy. Moreover, the demagnetization and magnetization of the magnets in the rotor of the synchronous motor caused by the detachment state continuing to occur can be prevented. Damage to the main circuit components of the converter caused by the increase in current. Also, it can prevent the disconnection from continuing due to the disconnection state. Synchronous Motor Rage

Page 33 2112-4562-PF (N) .ptd 546908 V. Description of the invention (30) Sound and vibration. In addition, the detachment inspection device of the synchronous motor of the present invention can improve the accuracy of detachment inspection by detecting only a specific frequency component when detecting the AC component from the d-Q coordinate 糸 current. In addition, the detachment inspection device of the synchronous motor of the present invention can increase the accuracy of the detachment inspection by making a specific frequency component a frequency that is twice the frequency of the voltage output by the inverter device.

In addition, the detachment inspection of the synchronous motor according to the present invention can improve the accuracy of the detachment inspection by detecting only a specific frequency component when detecting the AC component from the d-q coordinate system current. In addition, the detachment inspection device of the synchronous motor of the present invention uses the detachment inspection level 9 which is compared with the average value of the q-axis current AC component as the 200% of the rated current of the synchronous motor. The effect of load torque and DC voltage fluctuations can reliably check for detachment. In addition, the disconnection check of the synchronous motor of the present invention is performed at a low speed, and the disconnection check is difficult, and; just: = The check of the disconnection is performed as fast as the number of rotations of the fixed movement, and the check of P is performed. One can be used to separate the motor from acceleration and deceleration when it is separated from Ai Motor and synchronous motors. It is possible to remove the two or two motors by using the error detection outside the acceleration and deceleration process because of the possibility of occasions. Can be done for inspection. The disconnection inspection process is performed. Furthermore, the synchronous motor of the present invention includes: the current detection is set to detect the current flowing in the same inspection device by including the electric motor; wheel out _ I 2112-4562-PF (N) .ptd-*-

Page 34 546908 V. Description of the invention (31) The voltage instruction is calculated and applied to the computing device. The command value is based on the comparison. The comparison consists of the size and the deviation from the constant detection device. In the present invention, the flow detection step is changed to another step, and the alternating detection step of the AC component axis current that forms the exciting current flow is arbitrarily set, and the detachable state is the subsequent changed current state as the succession. Moreover, the computing device uses the current detection The current signal obtained by the device is used to synchronize the output voltage command value of the motor; the output voltage vector is obtained by using the output voltage command obtained by the output voltage command calculation device; the output voltage is detected by installing the output voltage vector calculation device Vector check level; and a detachment inspection device that inspects detachment by comparing results obtained from output voltage differences, and simplifies it to detect detachment with good accuracy. Furthermore, it is possible to prevent the demagnetization of the magnet in the rotor and the increase in current caused by the interruption from damaging the main circuit components of the device. Moreover, the noise and vibration of the synchronous motor due to the disengagement can be prevented. The method for checking the disconnection of a synchronous motor includes: electricity, detecting the current flowing in the synchronous motor; the dq coordinate is converted to the current obtained by the current detection step 彳 §, and the coordinate conversion component (d-axis current) and the torque current component (q Axis current); an electrical detection step to obtain the d-q current component obtained from the d-q coordinate conversion step; and a detachment check step to compare at least any one of the dQ axis current AC components obtained from the alternating current to be out of position with it The signal is checked for detachment with accuracy, and the simplification is checked with good accuracy. Furthermore, it is possible to prevent the demagnetization of the magnet in the rotor and the increase in current caused by the interruption from damaging the main circuit components of the device. Moreover, the noise and vibration of the synchronous motor due to the disengagement can be prevented. The detachment inspection method of the synchronous motor of the present invention

2112-4562-PF (N) .ptd Page 35 546908 V. Description of the invention (32) Including: current detection step, which detects the current flowing in the synchronous motor; dq coordinate conversion step, which coordinates the current signal obtained from the current detection step to the coordinates Converted into exciting current component (d-axis current) and torque current component (q-axis current); AC current component detection step to find the AC component of dq-axis current obtained from the dQ coordinate conversion step; AC component averaging step to find The d-q-axis current AC components are averaged by the effective value or the absolute value of the d-q-axis current AC components obtained in the step of detecting the current and AC components, and the d-q-axis current AC components are averaged; At least any one of the averaged values of the dq-axis current AC components obtained in the quantization step and any set detachment level signal are used to check the detachment, and the detachment can be checked with high accuracy with a simple and easy structure. In addition, since the averaging is used as the detection value, it is possible to prevent erroneous detection due to variations in load torque or voltage variation of the synchronous motor. Furthermore, it is possible to prevent damage to the main circuit components of the converter caused by the demagnetization of the magnet in the rotor of the synchronous motor and the increase of the current due to the continued state. Furthermore, it is possible to prevent the noise and vibration of the synchronous motor caused by the disconnection from continuing. In addition, the method for checking the disconnection of the synchronous motor of the present invention includes: a current detection step to detect a current flowing in the synchronous motor; and a dq coordinate conversion step, which converts the current signal obtained from the current detection step into a coordinated magnetizing current component (d Axis current) and torque current components (q-axis current); current error calculation step, find the difference between the d-q coordinate current obtained from the dq coordinate conversion step and the d _ q coordinate current command value, the current error parent flow component detection step ， Detect the dq-axis electric current obtained by the current error calculation device

2112-4562-PF (N) .ptd Page 36 546908 V. Description of the invention (33) The j component of the current error crossover; and from the check step, compare the dq-axis current error exchange obtained by the current six-current component detection = step. Which one of the components is up to Ren Si is set to check the detachment level signal, and the detachment is inspected with a simplified structure, and the detachment can be checked with good accuracy. Moreover, the demagnetization of the main circuit components of the converter caused by the demagnetization and current increase in the rotor of the synchronous motor caused by the disconnection state continues, and it can prevent the same sound produced by the disconnection state from continuing. And vibration. The sacrifice of work only detects a specific frequency. Furthermore, the t-synchronized electric motor of the present invention detects the AC component from the d-q coordinate system current when detecting the AC component, which can improve the accuracy of the detachment inspection. Moreover, the detachment inspection of the synchronous motor of the present invention is made by turning the specific frequency component into a current of the converter device: the frequency can be doubled to improve the accuracy of the detachment inspection. In addition, the method of detachment inspection of this rigorous t-synchronous electric bucket is to improve the accuracy of detachment inspection by detecting only the d and q components when detecting the AC component of the current error. In addition, the method of disconnection inspection of the synchronous motor of the present invention is based on the comparison of the average value of the AC component of the spot Q-axis current. The disconnection inspection is about 200% of the rated current of the synchronous motor, but can be different from the direct current. The effect of voltage fluctuations can reliably check for detachment. Load torque Furthermore, the present invention = the disengagement of the synchronous motor is difficult when the disengagement check is performed at low speed, = the disengagement check can be performed from the speed to a fixed number of rotations.

2112-4562-PF (N) .ptd Page 37 546908 V. Inspection of Invention Description (34). Moreover, when the detachment inspecting side of the synchronous motor of the present invention performs the acceleration and deceleration of the synchronous motor, it has a disconnection: can be used to perform the disengagement: check; deceleration ... to perform the disengagement inspection process, and the synchronous motor of the present invention The test step is separated from the test, and the detection flow flows in the same machine = hunt = "command operation step 'is calculated by the output of the current detection step, and the output voltage command $ ^ signal applied to the synchronous motor is calculated by the output voltage command' The output voltage vector is obtained based on the voltage vector step value of the step; the output voltage command is compared, and the output voltage vector operation step &quot; hangs the detection step from the check level; and the check step is separated; the pressure vector :: test step The comparison results obtained can be used to check the difference between the voltage and the output voltage, and it is possible to accurately check the voltage in the rotor that is generated by the intermittent state of the disconnection. This can prevent the main circuit of the converter due to deconduction. The destruction of the components. However, the increase of the magnetic and current is to continue the generation of the synchronous motor. The drive unit of the hermetic compressor; Second, the movement. »Any of the 1st to 10th in the scope of patents-^ It is transferred to be equipped with a device such as an application inspection, which can improve the disengagement of the Ct motor due to the disengagement. Guide noise and compressor vibration = ^% pressure generated at the same time

2112-4562-PF (N) .ptd P.38 Demagnetization of the magnet of the rotor or problems of injury or damage caused by using + conductor components * L ^ plus the converter installed one ", therefore Reliability can be achieved 546908 V. Description of the invention (35) High cold refrigerator and air conditioner. The driving device of the fan motor of the present invention is equipped with any one of the tenth item in the scope of patent application. The disconnection checking device of the synchronous motor can improve the refrigerant pipe damage caused by the compressor noise and the compressor vibration caused by the disconnection, or the reduction of the magnet used in the rotor of the motor. Problems such as damage to the semiconductor components of the converter device due to magnetism or increased current. Therefore, it is possible to realize highly reliable cold bead refrigerators and air conditioners.

2112-4562-PF (N) .ptd Page 39 546908 The diagram briefly explains and displays the disconnection of the synchronous motor, explains the various operations during synchronous operation, explains the various waves during the disconnection, and displays the flow of the disengagement inspection process, and explains the various variations during the disengagement. Wave and display the detachment inspection process flow and display the synchronous motor detachment and display the detachment inspection process flow. FIG. 1 is a diagram showing the configuration of the detachment inspection device of the first embodiment. Fig. 2 is a diagram showing waveforms in the first embodiment. Fig. 3 is a diagram showing a pattern of the first embodiment. Fig. 4 is a flowchart showing a flowchart of the first embodiment. Fig. 5 is a diagram showing a pattern of the first embodiment. Fig. 6 is a flowchart showing a flowchart of the first embodiment. Fig. 7 is a diagram showing the configuration of the separation inspection device of the second embodiment. Fig. 8 is a flowchart showing the procedure of the second embodiment. Fig. 9 is a diagram showing the structure of a conventional separation inspection device for a synchronous motor.

2112-4562-PF (N) .ptd Page 40 546908 Brief description of the drawing 3 f W-phase lower side switching element 5 Converter main circuit 7a, 7b Current detection device 9 PWM signal generator 11 3-phase 2-phase conversion device 4 Return current diode 6 DC brushless motor 8 Converter control device 1 0-phase current calculation device 12 Voltage command value calculation device 1 3 Output voltage vector calculation device 1 4 DC voltage detection device 1 5 AC component detection device 1 6 Disengage Inspection device 17 Output voltage abnormality detection device 18 Disengagement inspection device

2112-4562-PF (N) .ptd Page 41

Claims (1)

546908 VI. Application for Patent Scope 1. A synchronous motor disengagement inspection device, a position sensor for detecting the rotor position to drive Tongzhou Lei Er as a non-use device. The electric motor converter is characterized by including: a current detection device To detect the current flowing in the aforementioned synchronous, dq coordinate conversion device, and to convert the stomach current from the aforementioned current detection machine; the current signal is used to convert the coordinates into an exciting current component ((1 axis, the resulting current component (q-axis current); shaking machine) and The torque electric current AC component detection device obtains the AC component of the dq-axis current obtained from the foregoing setting; and the coordinate conversion device is provided with a detachment inspection device, and compares at least any of the AC component of the dq-axis current obtained from the foregoing current contribution— Fang Yijian / Zhejiang set the departure level signal to check the departure. One tolerance was set up. 2 · A type of synchronous motor's departure inspection device, a position sensor to detect the rotor position to drive the same + belt ,,,,乂 It is not used as a device. ^ The converter of a motor is characterized by including: a current detection device that detects the flow In the aforementioned synchronous dq coordinate conversion device, the current driven by the aforementioned current; the current signal is coordinately converted into the exciting current component (the current component (q-axis current) obtained by the d wheel and the second set; / heart) and the torque electric current W parent current component The detection device 'obtains the AC component of the dq-axis current obtained from the aforementioned d ~ settings; the Q-coordinate conversion device is equipped with an AC component averaging device, and obtains the celebrity component a "L parent current component detection clam 2112-4562-PF (N) .ptd Page 42 M6908 6. The scope of the patent application f ί The average value of the effective or absolute value of the d-q-axis current AC component, and the d-q-axis current The AC components are averaged; and XI Η-άά 离 &quot; ^ 查 装置 'compares at least any of the averaged values of the current components obtained by the aforementioned AC component averaging device to at least any one-side and any δ and 脱离 out of position. Check the signal and check for disengagement. 3. —A kind of detachment inspection device for synchronous motors, which is a converter device for driving synchronous motors with a position sensor that does not use as a two-core rotor position detector, which is characterized by: The current detection device detects the current flowing in the aforementioned synchronous motor; ★ The coordinate conversion device converts the current signal obtained by the aforementioned current detection device into coordinates of the exciting current component (d-axis current) and the torque current component (q-axis current); The error calculation device obtains the error between the d-q coordinate current obtained by the aforementioned d-q coordinate conversion device and the dq coordinate current command value; the current error AC component detection device detects the dq-axis current error obtained by the aforementioned current error calculation device Communication components; and The disengagement inspection device checks disengagement by comparing at least one of the d-q-axis current error AC components obtained by the aforementioned current error AC component detection device with an arbitrary set disengagement level signal. 4. The disconnection inspection device for a synchronous motor according to item 1 or 2 of the scope of the patent application, wherein only a specific frequency component is detected when the parent stream component is detected from the aforementioned d-q coordinate "> IL". 5 · Detachment of synchronous motor as described in item 4 of the scope of patent application 2112-4562-PF (N) .ptd p.43, “Applicable patent scope check device set m k Among them, if the aforementioned specific frequency component is made into a frequency of 2 times the frequency of the 6 I of the converter. The two teams of the same-motor-disengagement test described in item 3 of the patent application park were checked and installed. Among them, the detection of the d-Q coordinate system current error communication has become '1. The detection of a specific frequency component. The comparison of the above-mentioned average value of the AC component of the q-axis current is shown in the check of the disconnection of the synchronous motor described in the second item of Charroe's patent application. The inspection level is taken as 200% of the rated current of the synchronous motor out of the range of 8%. I request the shape of the synchronous motor described in item 1, 2 or 3 of the patent scope. Among them, when rotating at low speed The disengagement test is difficult = private, and the muscle disengagement test is performed immediately after the start of acceleration to a fixed number of rotations. Detachment 1 There is a decoupling inspection device for a synchronous motor as described in claim 1, 2 or 3 of the patent scope, in which, when the acceleration and deceleration of the synchronous motor is performed, there is a possibility of erroneous detection by an external Γ inspection During the acceleration / deceleration process: Γ is used to perform the separation check process. ^ ^ Synchronous motor disconnection detection devices, # Λ 以; As the detection of the rotor position, your device is a non-use device, σ is used to drive the synchronous motor. It is characterized by: ·· The current detection device detects the current flowing through the output voltage command computing device to: ί Synchronize the motor's current; The current signal to find the output voltage command applied to the aforementioned J-step motor with the same = 34 current detection | setting 2112-4562-PF (N) .ptd 546908 6. Value of patent application; Output voltage vector computing device, based on the output voltage command value obtained by the aforementioned output voltage command computing device, to find the output voltage vector; The output voltage is abnormal The detection device compares the magnitude of the output voltage vector obtained by the aforementioned output voltage vector calculation device with the detachment check level; and the detachment check device checks the detachment with the comparison result obtained by the aforementioned output voltage abnormality detection device. 11. A method for checking the disconnection of a synchronous motor, which uses a position sensor that does not use a position sensor to detect the rotor position to drive a synchronous motor. It is characterized by including a current detection step to detect the flow in the synchronous motor. Dq coordinate conversion step, which converts the current signal obtained from the aforementioned current detection step into an exciting current component (d-axis current) and a torque current component (Q-axis current); the current AC component detection step obtains the dq The AC component of the dq-axis current obtained in the coordinate conversion step; and the disengagement checking step, which compares at least one of the aforementioned dq-axis current AC components obtained in the aforementioned current and AC component detection step with any set disengagement level signal to check for disengagement. 1 2. —A method for checking the disconnection of a synchronous motor, which uses a position sensor that detects the position of the rotor to drive the converter of the synchronous motor without using it. It is characterized by: 2112-4562-PF (N) .ptd page 45 j ^ 9〇8, patent application range current detection step to detect the current flowing in the aforementioned synchronous motor, put on the wq seat ^ conversion step, will be detected by the aforementioned current The electric and long Wu obtained in the steps are shown to be converted into an exciting current component (d-axis current), and the disk force is 4 2 components (U-axis current); L, torque current, and AC component detection steps are to be determined by the aforementioned d_q block Set the AC component of the axis current; get the dressing parent stream component averaging step, find the effective value or half of the absolute value of the d-q axis current AC component passed by the current, and exchange the dq axis current The components are averaged; and two detachment checking steps, comparing at least any of the averaged values of the quilt # 1 machine-parent component averaged by the aforementioned AC components and checking the detachment level signal with any 咅 σ and 疋. /, ^ 1 3 · —A method for detecting the disconnection of a synchronous motor, which is a position sensor that detects the position of the rotor to drive the electric and motor devices. The feature of less motor current is that it includes: a current detection step to detect the flow In the aforementioned "long dq coordinate conversion step of the synchronous motor", the current signal is converted into the exciting current component ((1 axis ☆, the current component of the U-axis current); the electric current w) and the torque electric y. The current error calculation step is to find the error between the dq coordinate current and the d -q coordinate current command value obtained from the aforementioned d — Q coordinate drag + _, and the current error “v” becomes a sub-detection step. AC component of the dq-axis current error; &amp; unit difference operation 546908 VI. Patent Application Detachment check step, comparing at least one of the d-q-axis current error AC components obtained from the aforementioned current error parent current component detection step with any set deviation level signal to check for deviation. 14. The method for checking the detachment of a synchronous motor according to item η or 12 of the scope of application for a patent, wherein only a specific frequency component is detected when the cross-slL component is detected from the aforementioned d-Q coordinate 糸 current. 1 5 · The method for checking the disconnection of a synchronous motor as described in item 4 of the patent application scope, wherein the specific frequency component is made twice the frequency of the voltage output by the inverter device. 16. The method for inspecting the disconnection of a synchronous motor according to item 13 of the scope of patent application ', wherein when detecting the AC component from the d-q coordinate system current, only a specific frequency component is detected. 1 7 · The method for detecting the disconnection of a synchronous motor as described in item 12 of the scope of the patent application 5 Ganshan Shangyi, /, Zhong 'compared with the aforementioned average value of the q-axis current AC component. As a 2000% of the rated current of the synchronous motor, the machine is out of check. In the case of low speed rotation, the check is stuck at a low speed. The speed is accelerated to a fixed number of rotations immediately after the start of the break. So far 1 9 · As mentioned above, the synchronous electric motor as described in item 11, 12, or 13 of the scope of the direct inspection of the straight line of the surname, has the detachment of "where" is not the acceleration process of the synchronous motor. When the possibility of false detection is checked, the water is added to perform the detachment check process. The scope of Liushenqing's patent is 1222. The method for checking the disconnection of a synchronous motor is to use a position sensor that does not use the C rotor position to drive the synchronous motor. It is characterized by including: 2: a detection step, Detect the current flowing through the synchronous motor; Thunder: / Pressure command operation step, use the value obtained from the current detection step to find the round voltage applied to the synchronous motor = the output voltage vector calculation step The output voltage instructs the output voltage obtained in the step of detecting the abnormality of the output voltage to the detachment checking step, and the detachment is checked by comparing the results. Then, the output voltage vector is obtained based on the operation value of the output voltage command. Steps are compared by comparing the magnitude of the output voltage vector's capacity with the check-out level. 21 Sealed ballast is the first departure inspection device in the scope of patent application. The drive device of the shrinking machine is characterized by: the driving device of the motor of the synchronous motor described in item 3 or 10, the item of 1, 1, 3 or 10 is characterized by: 2112-4562-PF (N) .ptd Page 48 1 2 · —Fan No. 1 inspection device for patent application scope.