JP4566695B2 - Magnetic pole position detector for wound field type synchronous machine - Google Patents

Description

  The present invention relates to a magnetic pole position detection device for a winding field type synchronous machine that generates a field magnetic field by a field winding of a rotor.

  The sensorless control system that drives the synchronous motor without a magnetic pole position sensor has advantages such as cost reduction, reliability improvement, and downsizing of the apparatus due to the absence of the sensor. Conventionally, in a magnetic pole position detection device for driving a synchronous motor without a magnetic pole position sensor, the electric saliency of the motor (a phenomenon in which the inductance between armature winding terminals varies depending on the rotor position of the motor) is used. In order to detect the magnetic pole position, an alternating voltage is applied to the armature winding of the electric motor, and magnetic pole detection is performed using the generated alternating armature current (for example, Patent Document 1). The present invention can also be applied to a wound field synchronous machine that generates a field magnetic field by a field winding.

Japanese Patent Application Laid-Open No. 7-245981 (page 2, right line 46 to page 3, left line 5, FIG. 1)

  However, the conventional magnetic pole position detection device for a synchronous motor detects the magnetic pole position when the target winding field synchronous machine, such as a synchronous machine having a cylindrical rotor, does not have electrical saliency. There was a problem that it was not possible.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a magnetic pole position detection device that is effective even for a winding field type synchronous machine having no electrical saliency. It is said.

  The magnetic pole position detection device for a wound field type synchronous machine according to the present invention detects an alternating signal generated in a field winding when an alternating signal is injected into an armature winding, or performs magnetic pole detection. The magnetic pole detection is performed by detecting the alternating signal generated in the armature winding when the alternating signal is injected into the magnetic winding.

  According to this invention, since the magnetic pole detection is performed by utilizing the interaction between the armature winding and the field winding, even if the target winding field synchronous machine does not have an electric saliency, the magnetic pole The position can be detected, and the winding field type synchronous machine having no electric saliency can be operated without the magnetic pole position sensor. Especially in a motor / converter integrated device, the space for the magnetic pole position sensor is no longer required, increasing the degree of freedom in configuration of the device design, and the space for the magnetic pole position sensor can be used for heat dissipation of the motor and the converter. It becomes advantageous in design.

First, in the following embodiments, a detector that detects an alternating signal of a field winding is a field current sensor when detecting a field current, and as a field voltage sensor when detecting a field voltage. explain. The detector that detects the alternating signal of the armature winding will be described as an armature current sensor when detecting an armature current, and as an armature voltage sensor when detecting an armature voltage.
Embodiment 1 FIG.

  FIG. 1 is a diagram showing a basic configuration of a magnetic pole position detecting device for a wound field type synchronous machine according to Embodiment 1 of the present invention. The winding field type synchronous machine 4 need not have electrical saliency, but may have electrical saliency. The alternating voltage command Vqh by the alternating signal generator 1 is input to the coordinate converter 2 together with the voltage command in the orthogonal direction where Vdh = 0, and is converted into the three-phase voltage commands Vu, Vv, Vw, and the armature side power converter 3 Is applied to the armature winding of the winding field type synchronous machine 4. A current If flowing in the field winding of the winding field type synchronous machine 4 is detected by a field current sensor 5, and this field current If is input to a magnetic pole position detector 6 to obtain a detected magnetic pole position θ. The coordinate converter 2 performs coordinate conversion according to the detected magnetic pole position θ.

FIG. 2 is a vector diagram showing the operation of the magnetic pole position detection device of the wound field type synchronous machine according to Embodiment 1 of the present invention. The field winding direction of the rotor is the d0 axis, the orthogonal direction is the q0 axis, and the angle formed by the d0 axis with respect to the armature winding U phase is the true magnetic pole position θ0. On the other hand, the angle formed by the magnetic pole detection coordinate system dq axis with respect to the armature winding U phase is the detected magnetic pole position θ. As shown in FIG. 2, in a state where the true magnetic pole position θ0 and the detected magnetic pole position θ do not coincide, when the alternating voltage Vqh is applied from the armature winding on the q axis, the alternating voltage is the actual field winding axis. It is also applied in the d0 axis direction. Since the armature winding and the field winding are electromagnetically coupled, when the alternating voltage Vqh is applied to the armature winding in the d0 axis direction, the alternating voltage Vfh is also generated in the field winding, As a result, an alternating current is generated in the field winding. On the other hand, if the true magnetic pole position θ0 and the detected magnetic pole position θ match, even if the alternating voltage Vqh is applied from the armature winding on the q axis, the alternating voltage has no d0 axial component. No alternating voltage is applied to the field winding, and no alternating current is generated as a result. As can be seen from FIG. 2, the alternating voltage Vfh acting on the field winding is expressed by equation (1).
Vfh = Vqh · sin (θ−θ0) (1)

Since an alternating current corresponding to the alternating voltage Vfh shown in Equation (1) is generated in the field winding, if the detected magnetic pole position θ is manipulated so that this alternating current becomes zero, the true magnetic pole position It is possible to make θ0 coincide with the detected magnetic pole position θ. FIG. 3 shows the internal structure of the magnetic pole position detector 6. The reference signal generator 7 generates a current reference signal Ifp having the same frequency and phase as the alternating current generated in the field winding. By multiplying the field current If and the current reference signal Ifp by the multiplier 8, an error signal eθ proportional to the amplitude of the alternating current is obtained. The magnetic pole tracking controller 9 is a controller for operating the detected magnetic pole position θ so that the error signal eθ becomes 0, and is, for example, an integrator or a PI controller.

FIG. 4 is a diagram showing the relationship among the waveforms of the alternating voltage Vqh, the current reference signal Ifp, the field current If, and the error signal eθ. With respect to the alternating voltage Vqh applied to the armature q-axis, the current reference signal Ifp has the same frequency, the amplitude is 1, and the phase is shifted with respect to Vqh according to the impedance. For example, the alternating frequency is the armature and the field. If it is sufficiently larger than the magnetic circuit time constant, the phase shift is approximately 90 °. The field current signal If is a waveform obtained by adding an alternating current to a DC component for the field, and the error signal eθ is an alternating waveform having an offset. As shown in FIG. 4, since the field current If includes a direct current component, when the signal is input to the magnetic pole position detector 6, a signal passing through a high-pass or band-pass filter by hardware or software is used. Then, it is advantageous in terms of current detection resolution and calculation resolution in magnetic pole detection signal processing. Further, since the error signal eθ includes pulsation due to an alternating component, when this signal is input to the magnetic pole tracking controller, an average value in a section of 1/2 of the alternating voltage period or a multiple thereof (FIG. 4). By using (indicated by a dotted line), unnecessary vibration of the detected magnetic pole position can be eliminated.

FIG. 5 shows the relationship between the deviation between the true magnetic pole position θ0 and the detected magnetic pole position θ and the error signal eθ (averaged value). As can be seen from the figure, the two signals are in a substantially proportional relationship near 0 (where the proportional coefficient ke is negative), and a control system that adjusts θ−θ0 to 0 using the error signal eθ can be easily configured. It is understood that it can be done. Note that the proportional coefficient ke changes in value due to magnetic saturation caused by the armature and field current, and as a result, the response of the magnetic pole position detector changes. However, the armature and field current (or armature flux linkage) It is possible to eliminate the change in the response of the magnetic pole position detector due to the operating conditions by grasping the relationship between the change of the good) and the proportional coefficient ke and multiplying the error signal by a coefficient that corrects this. You may do it.

As shown in FIG. 5, the deviation between the true magnetic pole position θ0 and the detected magnetic pole position θ shows a one-to-one correspondence in the section of −90 ° to 90 °. Accordingly, if the relationship shown in FIG. 5 is stored in the form of a table or the like in advance, the deviation between the true magnetic pole position θ0 and the detected magnetic pole position θ can be obtained immediately from the error signal eθ, and the magnetic pole tracking of an integrator or the like can be obtained. Since the true magnetic pole position θ0 can be calculated by referring to the above table without using a controller, the magnetic pole position can also be obtained by this method, and the response of magnetic pole detection is improved.

  As described above, by injecting an alternating voltage on the armature side and detecting an alternating current on the field side, a magnetic pole position sensor can be used even in a wound field type synchronous machine having no electrical saliency. Therefore, it is possible to detect the magnetic pole position.

In the above description, the method of injecting an alternating voltage on the armature side and detecting the alternating current on the field side has been described. However, the alternating voltage on the armature side is injected and the alternating voltage on the field side is detected. Thus, the magnetic pole position can be detected. In this case, as shown in the expression (1), the alternating voltage Vfh acting on the field winding may be directly detected. Specifically, in the configuration shown in FIG. 1, a field voltage sensor for detecting the voltage between the terminals of the field winding is provided instead of the field current sensor 5, and the detected field voltage Vfd detected by this field voltage sensor is provided. May be input to the magnetic pole position detector 6 instead of the field current If. The alternating component included in the field current If and the detected field voltage Vfd is different from the case of the field current in the phase with respect to the alternating voltage Vqh injected to the armature side. The reference signal generator 7 for detecting the magnetic pole position by detecting the alternating voltage on the magnetic side needs to generate the voltage reference signal Vfp having the same phase as the detected field voltage Vfd. FIG. 6 is a diagram showing a relationship among waveforms of the alternating voltage Vqh, the voltage reference signal Vfp, the field detection voltage Vfd, and the error signal eθ.

As described above, by injecting an alternating voltage on the armature side and detecting the alternating voltage on the field side, the magnetic pole position sensor can be used even in a wound field type synchronous machine having no electrical saliency. Thus, the magnetic pole position can be detected without any change, and the alternating component can be detected without being affected by the impedance characteristic of the field winding of the synchronous machine.

FIG. 7 shows the configuration of a synchronous machine control system to which the magnetic pole position detection device for a wound field type synchronous machine according to Embodiment 1 of the present invention is applied. The currents Iu, Iv, Iw flowing through the armature of the synchronous machine 4 are detected by the armature current sensor 10 and converted into currents Id, Iq on the dq axis coordinates by the coordinate converter 11. The armature current controller 12 calculates the dq axis voltage commands Vd and Vq from the dq axis current command values Id * and Iq * from the host controller (not shown) and the actual dq axis currents Id and Iq. An alternating voltage command Vqh from the alternating signal generator 1 is added to the q-axis voltage command Vq by the adder 13. The q-axis voltage command Vq ′ and the d-axis voltage command Vd after addition of the alternating voltage are input to the coordinate converter 2 and converted into the three-phase voltage commands Vu, Vv, and Vw. Applied to the armature winding of the magnetic synchronous machine 4. Further, the current If flowing in the field winding of the winding field type synchronous machine 4 is detected by the field current sensor 5, and the field current controller 14 receives a field current command If from a host controller (not shown). The field voltage command Vf is calculated from * and the actual field current If, and the same voltage is applied to the field winding of the winding field type synchronous machine 4 by the field side converter 15. On the other hand, the detected field current If is input to the magnetic pole position detector 6 to obtain the detected magnetic pole position θ, and the coordinate converters 2 and 11 perform coordinate conversion according to the detected magnetic pole position θ. In the synchronous machine control system configured as described above, the function of each part for detecting the magnetic pole position is the same as in the case of FIG. 1, and the magnetic pole position detection can be performed integrally with the synchronous machine control system. I can do it. In order to avoid the influence of the injected alternating voltage, the alternating voltage frequency component may be removed from the dq axis currents Id and Iq input to the armature current controller 12 using a low pass or band pass filter. Similarly, the alternating voltage frequency component may be removed from the field current If input to the field current controller 14 using a low-pass or band-pass filter.

In the above description, the method of injecting an alternating voltage on the armature side has been described. However, the magnetic pole position can also be detected by a method of injecting an alternating current on the armature side and detecting an alternating current on the field side. Compared with the case where an alternating voltage is injected, an alternating current having a desired amplitude can be generated without being affected by the impedance of the armature winding of the synchronous machine, and stable detection can be performed. FIG. 8 shows the configuration of a synchronous machine control system to which a magnetic pole position detection device for a wound field type synchronous machine is applied by a method of detecting an alternating current on the field side by injecting an alternating current on the armature side. In the configuration of FIG. 8, the alternating current command Iqh from the alternating signal generator 1 is added to the q-axis current command value Iq * from the host controller (not shown) by the adder 13, and the q-axis current after adding the alternating current is added. Command Iq * ′ is calculated and input to armature current controller 12. An alternating current having the same frequency is generated in the field current If by the injected alternating current, and this alternating current can be detected as in FIG. 7 to detect the magnetic pole position. In this case also, the current reference signal Ifp used in the magnetic pole position detector 6 needs to use a signal having the same phase as the alternating component of the generated field current. FIG. 9 shows the relationship among the waveforms of the alternating current command Iqh, current reference signal Ifp, field current If, and error signal eθ in this case.

As described above, by injecting an alternating current into the armature side and detecting the alternating current on the field side, the magnetic pole position sensor can be used even in a wound field type synchronous machine having no electrical saliency. Thus, the magnetic pole position can be detected without any change, and an alternating current having a desired amplitude can be generated without being affected by the impedance of the armature winding of the synchronous machine, and stable detection can be performed.

The method of injecting an alternating current into the armature side to detect the alternating voltage at the field side also combines the method of injecting the alternating current shown in FIG. 8 with the detection method using the field voltage sensor described above. Therefore, the magnetic pole position can be detected, and an alternating current having a desired amplitude can be generated without being affected by the impedance of the armature winding of the synchronous machine, so that stable detection can be performed. At the same time, the alternating component can be detected without being affected by the impedance characteristics of the field winding of the synchronous machine.
Even in this case, the current reference signal Vfp used in the magnetic pole position detector needs to use a signal having the same phase as the alternating component of the generated field voltage Vfd. FIG. 10 shows the relationship among the waveforms of the alternating current command Iqh, the voltage reference signal Vfp, the detected field current Vfd, and the error signal eθ in this case.

As described above, by injecting an alternating current into the armature side and detecting the alternating voltage on the field side, the magnetic pole position sensor can be used even in a wound field type synchronous machine having no electrical saliency. It is possible to detect the position of the magnetic pole without any change, generate an alternating current with a desired amplitude without being affected by the impedance of the armature winding of the synchronous machine, and perform stable detection. Furthermore, the alternating component can be detected without being affected by the impedance characteristic of the field winding of the synchronous machine.
In addition to the alternating voltage or alternating current generated by the armature side alternating voltage or alternating current, the actual field current or detected field voltage includes a field side converter (such as a PWM amplifier or thyristor converter). There may be periodic voltage or current pulsations that occur. In order to avoid the influence of pulsation by these field side converters in the magnetic pole position detection, the frequency of the alternating voltage or alternating current applied from the armature side is set to 1 / n of the frequency of pulsation by the converter (n is (Multiple of 2).

11 and 12 show waveforms in the case where periodic pulsations exist in the field current in the relationship among the waveforms of the alternating voltage Vqh, the current reference signal Ifp, the field current If, and the error signal eθ shown in FIG. . FIG. 11 shows a case where the frequency of the alternating voltage Vqh is 1 / n (n = 2) of the frequency of the periodic pulsation, and FIG. 12 shows that the frequency of the alternating voltage Vqh is n of the frequency of the periodic pulsation. This is a case where the relationship is not 1 / n (n = 2). In each figure, the field current If has a waveform that is the sum of a sinusoidal component (same as in the figure) and a sawtooth-like periodic fluctuation component, and the error signal eθ is disturbed by the influence of the periodic fluctuation component. In the case of FIG. 11, periodic pulsations due to even-numbered field-side converters are included in one cycle of the reference signal Ipf, and these even-numbered pulsations have the same magnitude and are labeled by error signal processing. In order to reverse, the influence of the pulsation can be eliminated by averaging the error signal in one cycle of the reference signal (or an integer multiple thereof). On the other hand, in the case of FIG. 12, the periodic pulsation caused by the field-side converter that appears in one period of the reference signal Ipf is not constant, and therefore the influence of the periodic pulsation is caused even if the error signal is averaged with the period of the reference signal. Cannot be lost.

As described above, by setting the frequency of the alternating voltage or alternating current applied from the armature side to 1 / n (n is a multiple of 2) of the pulsation frequency by the converter, the field side for the magnetic pole position detection The effects of periodic voltage or current pulsations generated by the converter can be avoided.

Embodiment 2. FIG.
In the above embodiment, the magnetic pole position detecting device has been described in which an alternating signal is injected into the armature side and detected on the field side. Conversely, an alternating signal is injected into the field side to reverse the armature side. The magnetic pole position can also be detected by the method of detecting by.
FIG. 13 is a vector diagram showing the operation of the magnetic pole position detection device of the wound field type synchronous machine according to the second embodiment of the present invention. As shown in the figure, in the state where the true magnetic pole position θ0 and the detected magnetic pole position θ do not match, if the alternating voltage Vfh is applied from the field winding on the d0 axis, the armature winding and the field winding are electromagnetically coupled Therefore, the alternating voltage is also applied in the q-axis direction, which is the control coordinate axis of the armature winding, and as a result, an alternating current is generated in the armature q-axis. On the other hand, when the true magnetic pole position θ0 and the detected magnetic pole position θ match, even if the alternating voltage Vfh is applied from the field winding on the d0 axis, the alternating voltage has a component in the armature q-axis direction. As a result, no alternating current is generated in the armature q-axis.
Since the relationship between the field voltage and the armature q-axis current is similar to the relationship between the armature q-axis voltage and the field current in the first embodiment, the magnetic pole position detection device is configured by the same method. Can do.

FIG. 14 shows the configuration of a synchronous machine control system to which the magnetic pole position detection device for a wound field type synchronous machine according to Embodiment 2 of the present invention is applied. In FIG. 7, the alternating voltage command Vfh is added to the field voltage command Vf output from the field current controller 14 by the adder 13, and the field voltage command Vf ′ after the addition of the alternating voltage is applied to the field winding. Applied. The armature currents Iu, Iv, Iw are converted by the coordinate converter 11 into currents Id, Iq on the dq axis coordinates. As described above, since the magnetic pole detection can be performed using the alternating component included in the q-axis current Iq, the q-axis current Iq is input to the magnetic pole position detector 6 to obtain the detected magnetic pole position θ. The coordinate converters 2 and 11 perform coordinate conversion according to the magnetic pole position θ. The configuration of the magnetic pole position detector 6 in the second embodiment is obtained by changing the input signal from the field current If to the armature q-axis current Iq in the configuration shown in FIG.

In the magnetic pole position detection device of the second embodiment described above, the alternating voltage is injected into the field winding, so there is no need to ensure a margin for the alternating voltage injection in the armature voltage, and the synchronous machine The power usage rate on the child side can be improved.

Also in the second embodiment, not only the method of injecting the alternating voltage on the field side and detecting the alternating current on the armature side as described above, but also the method of injecting the alternating voltage on the field side and alternating the armature side The magnetic pole position detection device can also be configured by the method of detecting the voltage by the armature voltage sensor, and the alternating component can be detected without being affected by the impedance of the armature winding of the synchronous machine.
It is also possible to construct a magnetic pole position detecting device by injecting an alternating current on the field side and detecting the alternating current on the armature side, which is affected by the impedance characteristics of the field winding of the synchronous machine. Therefore, an alternating current having a desired amplitude can be generated, and stable detection can be performed.
Also, it is possible to construct a magnetic pole position detection device by injecting an alternating current into the field side and detecting the alternating voltage on the armature side, and it is affected by the impedance of the armature winding of the synchronous machine The alternating component can be detected without any change, and the alternating current having a desired amplitude can be generated without being affected by the impedance characteristic of the field winding of the synchronous machine, so that stable detection can be performed.

In the above case, even if the armature voltage command is used instead of the armature voltage detection value, the magnetic pole position can be detected if the response of the armature current control is sufficiently high.
Also in the case of the second embodiment, as in the first embodiment, the frequency of the alternating voltage or alternating current applied from the field side is set to n minutes of the frequency of the voltage or current pulsation generated by the armature side converter. By setting 1 (n is a multiple of 2), the influence of the pulsation on the magnetic pole position detection can be avoided.

It is a figure which shows the basic composition of the magnetic pole position detection apparatus of the winding field type synchronous machine by Embodiment 1 of this invention. It is a vector diagram which shows operation | movement of the magnetic pole position detection apparatus of the winding field type synchronous machine by Embodiment 1 of this invention. It is a block diagram which shows the internal structure of the magnetic pole position detector of FIG. It is a figure which shows the relationship of the waveform of an alternating voltage, a current reference signal, a field current, and an error signal in the magnetic pole position detection apparatus of the winding field type synchronous machine by Embodiment 1 of this invention. It is a figure which shows the relationship between a true magnetic pole position, a detection magnetic pole position shift | offset | difference, and an error signal in the magnetic pole position detection apparatus of the winding field type synchronous machine by Embodiment 1 of this invention. It is a figure which shows the relationship of the waveform of an alternating voltage, a voltage reference signal, a field current, and an error signal in the magnetic pole position detection apparatus of the winding field synchronous machine by Embodiment 1 of this invention. It is a figure which shows the structure of the synchronous machine control system to which the magnetic pole position detection apparatus of the winding field type synchronous machine by Embodiment 1 of this invention is applied. Configuration of Synchronous Machine Control System Applying Magnetic Field Position Detection Device for Winding Field Synchronous Machine Using Method for Injecting Alternating Current on Armature Side and Detecting Field-side Alternating Current According to Embodiment 1 of the Present Invention FIG. An alternating current command, a current reference signal in a magnetic pole position detection device of a wound field type synchronous machine by a method of injecting an alternating current on the armature side according to Embodiment 1 of the present invention and detecting the alternating current on the field side, It is a figure which shows the relationship between the waveform of a field current and an error signal. An alternating current command, a voltage reference signal, and a voltage reference signal in a magnetic pole position detection device of a wound field type synchronous machine by a method of injecting an alternating current into the armature side according to Embodiment 1 of the present invention to detect an alternating voltage on the field side It is a figure which shows the relationship between the field voltage and the waveform of an error signal. It is a figure which shows the relationship of the waveform of an alternating voltage, the current reference signal, a field current, and an error signal in the magnetic pole position detection apparatus of the winding field type synchronous machine by Embodiment 1 of this invention, Comprising: It is a figure which shows the case where the periodic fluctuation which a field side converter generate | occur | produces is included, and the frequency of an alternating voltage has the relationship of 1 / n (n = 2) of the frequency of the said periodic pulsation. It is a figure which shows the relationship of the waveform of an alternating voltage, the current reference signal, a field current, and an error signal in the magnetic pole position detection apparatus of the winding field type synchronous machine by Embodiment 1 of this invention, Comprising: It is a figure which shows the case where the periodic fluctuation which a field side converter generate | occur | produces is included, and the frequency of an alternating voltage does not have the relationship of 1 / n (n = 2) of the frequency of the said periodic pulsation. It is a vector diagram which shows operation | movement of the magnetic pole position detection apparatus of the winding field type synchronous machine by Embodiment 2 of this invention. It is a figure which shows the structure of the synchronous machine control system to which the magnetic pole position detection apparatus of the winding field type synchronous machine by Embodiment 2 of this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Alternating signal generator, 3 Armature side converter, 4 Winding field type synchronous machine, 5 Field current sensor, 6 Magnetic pole position detector, 10 Armature current sensor, 13 Adder, 15 Field side converter

Claims (6)

A winding field type synchronous machine, an alternating signal generator for injecting a desired alternating signal into the armature winding of the synchronous machine , and a single-phase field winding provided in the synchronous machine by the alternating signal; An alternating signal detector for detecting the generated alternating signal, a reference signal included in the field winding and having the same frequency and phase as the alternating signal injected into the armature winding, and the alternating signal detection By multiplying the alternating signal detected by the generator, an error signal proportional to the amplitude of the alternating signal is generated, and the rotor magnetic pole position of the synchronous machine is detected by controlling the error signal to be zero. A magnetic pole position detector for a wound field type synchronous machine, comprising: A wound field synchronous machine, an alternating signal generator for injecting a desired alternating signal into a single-phase field winding provided in the synchronous machine, and an armature winding of the synchronous machine by the alternating signal An alternating signal detector for detecting the generated alternating signal, a reference signal included in the armature winding and having the same frequency and phase as the alternating signal injected into the field winding, and the alternating signal detection By multiplying the alternating signal detected by the generator, an error signal proportional to the amplitude of the alternating signal is generated, and the rotor magnetic pole position of the synchronous machine is detected by controlling the error signal to be zero. A magnetic pole position detector for a wound field type synchronous machine, comprising: 3. The magnetic pole position detecting device for a winding field type synchronous machine according to claim 1, wherein the alternating signal to be injected is a current or a voltage. 4. The magnetic pole position detection device for a winding field type synchronous machine according to claim 3, wherein the alternating signal to be detected is a current or a voltage. The frequency of the alternating signal injected into the armature winding is set to 1 / n (n is a multiple of 2) of the pulsation frequency of the field voltage or field current generated by the field side converter. The magnetic pole position detection apparatus of the winding field type synchronous machine according to claim 1 or 3. The frequency of the alternating signal injected into the field winding is 1 / n (n is a multiple of 2) of the pulsation frequency of the armature voltage or armature current generated by the armature-side converter. A magnetic pole position detection device for a winding field type synchronous machine according to claim 2 or 3.

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