JP6900848B2 - Inverter device adjustment method, inverter device adjustment device, and inverter device - Google Patents

Description

The present invention relates to an inverter device adjusting method, an inverter device adjusting device, and an inverter device.

In a PWM-controlled inverter device, DC power is converted to AC power by alternately turning on and off the two switching elements that make up each leg, but in actual switching elements (IGBTs, etc.), There is a switching delay time (especially turn-off time). Then, if the two switching elements constituting each leg are turned on at the same time, a problem occurs in the circuit in the device. Therefore, in the inverter device, a dead time is provided in which the two switching elements constituting each leg are both turned off. There is.

If a dead time is provided, the circuit in the device can be protected, but if a dead time is provided, an error occurs in the output voltage accordingly. Therefore, a general inverter device is configured to perform dead time compensation (to bring the output voltage closer to the target voltage by correcting the voltage command value or the like) (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 03-164071

The content of dead time compensation to be implemented differs depending on the usage environment of the inverter device (wiring length between the inverter device and the AC current supply destination (motor, etc.), etc.), but the content of dead time compensation depends on the use of the inverter device. At present, no technology has been developed that can be adjusted to suit the environment.

Therefore, the subject of the present invention is the content of the dead time compensation of the type performed by the inverter device, in which the set value is added to the voltage command value for the leg in which the current larger than the current threshold value is flowing, in the inverter device. The purpose is to provide a technology that can be adjusted appropriately according to the usage environment.

In order to solve the above problems, the adjustment method of the inverter device of the present invention generates a voltage command value for each leg of the inverter circuit based on an inverter circuit having one or more legs and a current command value. A control unit that generates a PWM signal supplied to two switching elements in each leg based on the generated voltage command value for each leg, and is for a leg in which a current larger than the current threshold is flowing out. This is an adjustment method of an inverter device including a control unit having a dead time compensation function for adding a set value to a voltage command value, and the control unit is in a state where the dead time compensation function of the control unit is stopped. , A measurement step of measuring the frequency / current gain characteristics of the inverter circuit by giving a sweep sine wave including a DC offset of an amount that does not switch between positive and negative as the current command value, and a measurement step of measuring the frequency / current measured by the measurement step. Based on the gain characteristics, the frequency is for calculating the set value by using the specific step of specifying the frequency for calculating the set value used for calculating the set value and the resistance and inductance of the load to which the output of the inverter circuit is supplied. A calculation step for calculating the amplitude of the AC voltage applied to the load when an AC current having a frequency and an amplitude of the current threshold is applied, and a voltage command value corresponding to the amplitude calculated by the calculation step. It includes a setting step for setting as the set value of the dead time compensation function.

That is, in the adjustment method of the inverter device of the present invention, a sweep sine wave including a DC offset of an amount that does not switch between positive and negative is given to the control unit as a current command value in a state where the dead time compensation function of the control unit is stopped. As a result, the frequency / current gain characteristics of the inverter circuit are measured. The frequency / current gain characteristics measured in this way are not affected by the dead time (not affected by the distortion of the output voltage due to the dead time). Therefore, if the set value of the dead time compensation function is set in the above procedure based on the frequency / current gain characteristic, the set value is added to the voltage command value for the leg in which a current larger than the current threshold value is flowing. The content of the type dead time compensation function can be adjusted appropriately according to the usage environment of the inverter device.

The dead time compensation function adjusted by the adjustment method of the inverter device of the present invention is less than the current threshold value even if the voltage command value for the leg into which a current having a magnitude less than the current threshold value is flowing is not changed. A "-set value" may be added to the voltage command value for the leg into which a current of the magnitude of is flowing. Further, the specific procedure for specifying the frequency of interest by the specific step is not particularly limited. The specific step may be, for example, a step of specifying a frequency near the peak value of the measured frequency / current gain characteristic as a frequency of interest.

Depending on the usage conditions of the inverter device, even if the current command value when measuring the frequency / current gain characteristics is a sweep sine wave that includes a DC offset that does not switch between positive and negative, the frequency / current gain is slightly affected by the dead time. Characteristics may be obtained. Therefore, by adopting a measurement step of the adjustment method of the inverter device of the present invention in which the amount of the DC offset is changed according to the usage conditions of the inverter device, the influence of the dead time is affected regardless of the usage conditions of the inverter device. It may be possible to measure the frequency / current gain characteristics that have not been received.

The method for adjusting the inverter device of the present invention is to provide the control unit with a sweep sine wave that does not include a DC offset as the current command value while the dead time compensation function of the control unit is stopped. The specific step further includes a second measurement step for measuring the frequency / current gain characteristic of the inverter circuit, and the specific step includes the frequency / current gain characteristic measured by the measurement step and the frequency / current measured by the second measurement step. The frequency for calculating the set value may be specified based on the gain characteristic. Further, as a specific step for specifying the frequency for calculating the set value based on the frequency / current gain characteristic measured by the measurement step and the frequency / current gain characteristic measured by the second measurement step, for example, the above-mentioned The average value of the frequency at which the current gain becomes a predetermined value in the frequency / current gain characteristic measured by the measurement step and the frequency at which the current gain becomes the predetermined value in the frequency / current gain characteristic measured by the second measurement step. , A frequency specified as the frequency for calculating the set value can be adopted.

In the adjustment method of the inverter device of the present invention, as a setting step, when the predetermined value and the predetermined current command value amplitude are expressed as X [dB] and I _in , respectively, the values represented by the following equations. A step of setting I _out as the current threshold value of the dead time compensation function may be adopted.

Further, the adjusting device of the inverter device of the present invention generates a voltage command value for each leg of the inverter circuit based on an inverter circuit having one or more legs and a current command value, and for each generated leg. A control unit that generates PWM signals supplied to two switching elements in each leg based on the voltage command value, and is set to the voltage command value for the leg in which a current larger than the current threshold is flowing out. It is an adjustment device of an inverter device provided with a control unit having a dead time compensation function for adding, and in a state where the dead time compensation function of the control unit is stopped, the control unit is subjected to the current command value. Based on the measuring means for measuring the frequency / current gain characteristics of the inverter circuit by giving a sweep sine wave including an amount of DC offset that does not switch between positive and negative, and the frequency / current gain characteristics measured by the measuring means. The frequency is the set value calculation frequency and the frequency is the set value calculation frequency by using the specific means for specifying the set value calculation frequency used for calculating the set value and the resistance and inductance of the load to which the output of the inverter circuit is supplied. A calculation means for calculating the amplitude of the AC voltage applied to the load when an AC current whose amplitude is the current threshold is applied, and a voltage command value corresponding to the amplitude calculated by the calculation means of the dead time compensation function. A setting means for setting as the set value is provided.

That is, the adjusting device for the inverter device of the present invention has a configuration capable of carrying out the adjusting method for the inverter device of the present invention. Therefore, even with the adjusting device of the inverter device of the present invention, the content of the dead time compensation of the type in which the set value is added to the voltage command value for the leg in which the current larger than the current threshold value is flowing is the usage environment of the inverter device. It can be adjusted to an appropriate one according to the situation.

Further, the inverter device of the present invention includes an inverter circuit having one or more legs and a control unit that controls the inverter circuit, and the control unit has each leg of the inverter circuit based on a current command value. A PWM signal generation means that generates a voltage command value for each leg and generates a PWM signal to be supplied to two switching elements in each leg based on the generated voltage command value for each leg, and a magnitude equal to or larger than the current threshold value. With the functions of the dead time compensating means for adding the set value to the voltage command value for the leg through which the current is flowing out and the dead time compensating means stopped, the control unit is positively or negatively charged as the current command value. The set value based on the measuring means for measuring the frequency / current gain characteristic of the inverter circuit by giving a sweep sine wave including a DC offset of an amount that does not switch, and the frequency / current gain characteristic measured by the measuring means. The frequency is the set value calculation frequency and the amplitude is determined by using the specific means for specifying the set value calculation frequency used for the calculation and the resistance and inductance of the load to which the output of the inverter circuit is supplied. The calculation means for calculating the amplitude of the AC voltage applied to the load when the AC current, which is the current threshold, is energized, and the voltage command value corresponding to the amplitude calculated by the calculation means are set in the dead time compensating means. It includes a setting means for setting as a value.

That is, the inverter device of the present invention has a configuration in which the above-mentioned adjusting device of the inverter device of the present invention is incorporated in the inverter device. Therefore, even with the inverter device of the present invention, the content of the dead time compensation of the type in which the set value is added to the voltage command value for the leg in which the current larger than the current threshold value is flowing is appropriate according to the usage environment. It can be adjusted to something.

According to the present invention, the usage environment of the inverter device is the content of the dead time compensation of the type in which the set value is added to the voltage command value for the leg in which the current larger than the current threshold is flowing out, which is performed by the inverter device. It is possible to provide a technique that can be adjusted to an appropriate value according to the situation.

FIG. 1 is an explanatory diagram of a usage mode of the adjusting device according to the embodiment of the present invention. FIG. 2 is a functional block diagram of a control unit included in the inverter device. FIG. 3 is an explanatory diagram of correspondence information. FIG. 4 is a schematic configuration diagram of the adjusting device according to the embodiment. FIG. 5 is a flow chart of the correspondence information adjustment process executed by the CPU of the adjustment device. FIG. 6A is an explanatory diagram of the first sweep sine wave. FIG. 6B is an explanatory diagram of the second sweep sine wave. FIG. 7A is an explanatory diagram of the correspondence information adjustment process. FIG. 7B is an explanatory diagram of the correspondence information adjustment process.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a usage mode of the adjusting device 10 according to the embodiment of the present invention.
As shown in the figure, the adjusting device 10 according to the present embodiment is a device connected to the inverter device 20.

The inverter device 20 is a device (servo driver) for driving a motor (three-phase motor) 40, and includes a power circuit 21 and a control unit 30.

The power circuit 21 is a circuit for generating a three-phase alternating current supplied to the motor 40. The power circuit 21 includes a rectifier circuit 22 for rectifying three-phase alternating current from the three-phase power supply 50, and a smoothing capacitor 23. Further, the power circuit 21 includes an inverter circuit 24 for converting the output voltage of the rectifier circuit 22 smoothed by the smoothing capacitor 23 into a three-phase AC voltage. The inverter device 20 is provided with a current sensor 25 for measuring the input / output current value of each leg of the inverter circuit 24.

The control unit 30 is basically a unit that controls the inverter circuit 24 according to an instruction from a controller (not shown) such as a PLC (Programmable logic controller). The control unit 30 is composed of a processor and its peripheral circuits. The control unit 30 contains signals from each current sensor 25 and signals from an encoder 41 (absolute encoder or incremental encoder) attached to the motor 40. Is entered.

Hereinafter, the function of the control unit 30 will be described.
First, the control content of the inverter circuit 24 by the control unit 30 will be described with reference to the functional block diagram shown in FIG. In the following description, the current measurement value (U-phase current measurement value, etc.) refers to the current flow direction measured by the current sensor 25 for each phase, and its symbol (current is flowing out from the leg side). The case is positive), and its absolute value is the value that represents the magnitude of the current.

As shown in FIG. 2, the control unit 30 is configured to operate as a current control unit 33, three adders 34, a PWM signal generation unit 35, and a dead time compensation unit 36.

The current control unit 33 has a U-phase voltage command value Vu, a voltage command value Vw for the V-phase, and a W-phase based on the current command value and the U-phase current measurement value, the V-phase current measurement value, and the W-phase current measurement value. It is a unit that generates a voltage command value Vw. More specifically, the current control unit 33 generates a current command value for each phase based on the current command value, and performs PI calculation of the deviation between the generated current command value corresponding to each phase and the current measurement value of each phase. Generates a voltage command value for each phase.

The dead time compensation unit 36 corrects the U-phase voltage command value Vu and the V-phase voltage command value Vw from the U-phase current measurement value, the V-phase current measurement value, and the W-phase current measurement value, respectively. It is a unit that generates a correction amount dVw of dVw and W phase voltage command value Vw.

Specifically, the rewritable non-volatile memory (flash ROM, etc.) in the dead time compensation unit 36 (in the control unit 30) has correspondence information that defines the correspondence between the current measurement value and the correction amount. 37 is remembered. The correspondence information 37 defines the correspondence as shown in FIG. 3, and the dead time compensation unit 36 sets the current measurement value Imeas of a certain phase to the current threshold value according to the correspondence information 37. If it is I _{th (>} 0) or outputs a voltage V _d as the correction amount of the phase. _{Further, the dead time compensation unit 36 receives V d} / 2 + Imeas · V _d / (2 · I) when the current measurement value Imeas of a certain phase is −I _th or more and _{less than I th.}
The _th), and outputs a correction amount of the phase, the current measured value Imeas certain phase, if it is less than -I _th is a "0" is output as the correction amount of the phase.

The PWM signal generation unit 35 adds a dead time for each switching element in the inverter circuit 24 based on the voltage command values (Vu + dVu, Vv + dVv, Vw + dVw) of each phase to which the correction amount is added by each adder 34. It is a unit that generates a gate drive signal (PWM signal).

The control unit 30 has an FFT (Fast Fourier Transform) function in addition to the control function of the inverter circuit 24 as described above.

The FFT function of the control unit 30 is a function of measuring the frequency / current gain characteristic (hereinafter, also referred to as gain characteristic) of the inverter circuit 24 (inverter device 20) and notifying the external device of the measurement result. When using the FFT function, a sweep sine wave is given to the control unit 30 as a current command value.

Hereinafter, the configuration and operation of the adjusting device 10 will be described.

FIG. 4 shows a schematic configuration of the adjusting device 10. As is clear from FIG. 4, the adjusting device 10 according to the present embodiment is a computer HDD 12 provided with an I / F 13 for communicating with the CPU 11, the ROM, the RAM, the inverter device 20, the display 14, and the like. It is a device in which the adjustment program 15 is installed.

The adjustment program 15 is a program developed for performing various adjustments of the inverter device 20. The CPU 11 starts executing the adjustment program 15 when the execution instruction of the adjustment program 15 is input.

The CPU 11 that has started the execution of the adjustment program 15 displays a screen on the display 14 for receiving an execution instruction of various adjustment processes including the correspondence information adjustment process. Then, when the CPU 11 is instructed to execute the correspondence information adjustment process, the CPU 11 executes the correspondence information adjustment process.

The correspondence information adjustment process is the process of the procedure shown in FIG.

That is, the CPU 11 that has started this correspondence information adjustment process controls the inverter device 20 so that the dead time compensation is not performed, and then uses the FFT function of the inverter device 20 to perform the first sweep as the current command value. The first gain characteristic, which is a gain characteristic when a sine wave is input, and the second gain characteristic, which is a gain characteristic when a second sweep sine wave is input as a current command value, are measured (step S101).

Here, controlling the inverter device 20 so that the dead time compensation is not performed means that the dead time compensation unit 36 controls the inverter device 20 so as to output "0" as a correction amount for each phase. is there. Further, the first sweep sine wave is a sine wave having a constant amplitude, no DC offset, and an increase in frequency with the passage of time, as shown in FIG. 6A. As shown in FIG. 6B, the second sweep sine wave is a sine wave in which a DC offset of an amount that does not switch between positive and negative is added to the first sweep sine wave.

After finishing the measurement of the first gain characteristic and the second gain characteristic, the CPU 11 specifies the frequency f1 at which the gain becomes the specified value X [dB] from the first gain characteristic, and the gain is the specified value from the second gain characteristic. The frequency f2 that becomes X [dB] is specified (step S102).

In the following step S103, the CPU 11 calculates the average frequency f of the frequency f1 and the frequency f2. _{Further, in order to obtain the current threshold I th} , the CPU 11 uses the following equation (1) to obtain the amplitude of the output current of the inverter device 20 in which the gain becomes X when the amplitude of the current command value is a predetermined value I _in. Calculate the value on the right side).

なお、Ｉ_ｔｈの単位は、Ｉ_ｉｎと同じ単位（例えば、Ａ（アンペア））である。

The unit of I _{th is the same unit as I in} (for example, A (ampere)).

Further, CPU 11 has a _{I th} obtained, and the frequency f calculated in step S102, and a resistance value R and inductance L of the motor 40, the following equation (2), an AC amplitude of _{I th} frequency at f _{The voltage V 0} applied to the motor 40 when the current is applied is calculated.

In step S103, the CPU 11 performs the above processing (calculation). Then, the CPU 11 that has completed the process of step S103 sets the parameters I _th and V _d (see FIG. 3) for the dead time compensation of the inverter device 20 to the voltage command values corresponding to _{I th} and V _{0, respectively.} After the change (step S104), the correspondence information adjustment process ends.

Hereinafter, the correspondence information adjustment process will be described in more detail.
Since the first sweep sine wave is a normal sweep sine wave, the first gain characteristic measured without dead time compensation has a frequency due to the influence of dead time as shown in FIG. 7A. The gain changes greatly depending on the frequency. On the other hand, the second sweep sine wave (FIG. 6B) is a sweep sine wave in which the positive and negative currents do not switch. Therefore, if the second sweep sine wave is used, it is possible to obtain the second gain characteristic as shown in FIG. 7A, that is, the gain characteristic that is not affected by the dead time.

In the correspondence information adjustment process, as shown in FIG. 7B, the frequency f1 at which the gain becomes the specified value X [dB] is specified from the first gain characteristic, and the gain is the specified value from the second gain characteristic. The frequency f2 that becomes X [dB] is specified. Then, the calculated average frequency f of the frequency f1 and frequency f2, the above (1) and (2), a current threshold value _{I th,} the frequency f, when the current command value of the amplitude _{I th} is given _{The voltage V 0} applied to the motor 40 is calculated.

Then, based on the calculation result, the parameters for dead time compensation in the inverter device 20 are adjusted (changed). Therefore, according to the correspondence information adjustment process, the inverter device 20 has a gain characteristic as shown by the dotted line in FIG. 7B, that is, there is no overcompensation at the time of a minute current or a large current, and the frequency f is reached. It can be adjusted to operate as a device with a high gain in the band.

<< Modification example >>
The above-mentioned technique can perform various modifications. For example, the dead time compensation function adjusted by the correspondence information adjustment process may be a function in which the compensation content is determined by _{the current threshold value I th and the set value V d} of the dead time compensation amount. Therefore, the dead time compensation function to be adjusted by the correspondence information adjustment process may be a different function from that correction amount when the current measurement value is less than I _th are described above. Further, the correspondence information adjustment process may _{be transformed into a process in which the current threshold value I th} is not changed, or a process in which only the second gain characteristic is measured and f2 / 2 is set to f. Further, the correspondence information adjustment process may be transformed into a process in which only the second gain characteristic is measured and the frequency near the peak value of the second gain characteristic is set to f.

The second sweep sine wave used in the correspondence information adjustment process is usually a sweep sine wave whose absolute minimum value is larger than "0". However, it is known that, depending on the usage conditions of the inverter device 20, when the minimum value is close to 0, a frequency / current gain characteristic slightly affected by the dead time can be obtained. Therefore, the correspondence information adjustment process is a process of changing the DC offset amount of the second sweep sine wave according to the usage conditions of the inverter device 20, that is, when the usage conditions of the inverter device 20 are close to "0". If the condition is such that the frequency / current gain characteristics slightly affected by the dead time can be obtained, the DC offset amount of the second sweep sine wave is up to the amount at which the frequency / current gain characteristics not affected by the dead time can be obtained. It may be transformed into a process of increasing. Further, the DC offset amount of the second sweep sine wave used in the correspondence information adjustment process is set to an amount that can obtain the frequency / current gain characteristics that are not affected by the dead time regardless of the usage conditions of the inverter device 20. You can keep it.

Further, it is natural that the control unit 30 of the inverter device 20 may be provided with an execution function of the correspondence information adjustment process, and that the inverter device 20 does not have to be for driving the motor. That is.

10 Adjustment device 11 CPU
12 HDD
13 I / F
14 Display 15 Adjustment program 20 Inverter device 21 Power circuit 22 Rectifier circuit 23 Smoothing capacitor 24 Inverter circuit 25 Current sensor 30 Control unit 33 Current control unit 34 Adder 35 PWM signal generator 36 Dead time compensation unit 37 Correspondence information 40 Motor 41 Encoder 50 Three-phase power supply

Claims (7)

An inverter circuit having one or more legs and a voltage command value for each leg of the inverter circuit are generated based on a current command value, and two in each leg based on the generated voltage command value for each leg. A control unit that generates a PWM signal supplied to the switching element and has a dead time compensation function that adds a set value to the voltage command value for the leg in which a current larger than the current threshold is flowing out. In the adjustment method of the inverter device equipped with
With the dead time compensation function of the control unit stopped, the frequency of the inverter circuit is determined by giving the control unit a sweep sine wave including a DC offset in an amount that does not switch between positive and negative as the current command value. Measurement steps to measure current gain characteristics and
Based on the frequency / current gain characteristics measured by the measurement step, a specific step for specifying the frequency for calculating the set value used for calculating the set value, and a specific step for specifying the frequency for calculating the set value.
Using the resistance and inductance of the load to which the output of the inverter circuit is supplied, the alternating current applied to the load when an alternating current whose frequency is the frequency for calculating the set value and whose amplitude is the current threshold is energized. Calculation steps to calculate the voltage amplitude and
A setting step of setting a voltage command value corresponding to the amplitude calculated by the calculation step as the set value of the dead time compensation function, and a setting step.
A method of adjusting an inverter device, which comprises. The measurement step changes the amount of the DC offset depending on the usage conditions of the inverter device.
The method for adjusting an inverter device according to claim 1, wherein the inverter device is adjusted. With the dead time compensation function of the control unit stopped, the frequency / current gain characteristics of the inverter circuit are measured by giving a sweep sine wave that does not include a DC offset to the control unit as the current command value. The second measurement step to be performed is further included.
The specific step specifies the frequency for calculating the set value based on the frequency / current gain characteristic measured by the measurement step and the frequency / current gain characteristic measured by the second measurement step.
The method for adjusting an inverter device according to claim 1 or 2, wherein the inverter device is adjusted. The particular step, the frequency of the current gain becomes a predetermined value in the frequency-to-current gain characteristic measured by the measuring step, the second current gain is said predetermined value in the measured frequency and current gain characteristic by measurement step The average value of the frequencies to be specified is specified as the frequency for calculating the set value.
The method for adjusting an inverter device according to claim 3, wherein the inverter device is adjusted. In the setting step, when the predetermined value and the predetermined current command value amplitude are expressed as X [dB] and I _{in , respectively, the value I out} represented by the following equation is set to the dead time compensation function. Set as the current threshold,

The method for adjusting an inverter device according to claim 4 , wherein the inverter device is adjusted. An inverter circuit having one or more legs and a voltage command value for each leg of the inverter circuit are generated based on a current command value, and two in each leg based on the generated voltage command value for each leg. A control unit that generates a PWM signal supplied to the switching element and has a dead time compensation function that adds a set value to the voltage command value for the leg in which a current larger than the current threshold is flowing out. In the adjusting device of the inverter device equipped with
With the dead time compensation function of the control unit stopped, the frequency of the inverter circuit is determined by giving the control unit a sweep sine wave including a DC offset in an amount that does not switch between positive and negative as the current command value. Measuring means for measuring current gain characteristics and
A specific means for specifying the frequency for calculating the set value used for calculating the set value based on the frequency / current gain characteristics measured by the measuring means, and a specific means for specifying the frequency for calculating the set value.
Using the resistance and inductance of the load to which the output of the inverter circuit is supplied, the alternating current applied to the load when an alternating current whose frequency is the frequency for calculating the set value and whose amplitude is the current threshold is energized. A calculation method for calculating the voltage amplitude and
A setting means for setting a voltage command value corresponding to the amplitude calculated by the calculation means as the set value of the dead time compensation function, and a setting means.
An inverter device adjusting device characterized by being provided with. Inverter circuits with one or more legs and
A control unit that controls the inverter circuit and
With
The control unit
Based on the current command value, the voltage command value for each leg of the inverter circuit is generated, and based on the generated voltage command value for each leg, the PWM signal supplied to the two switching elements in each leg is generated. PWM signal generation means and
A dead time compensation means that adds a set value to the voltage command value for the leg where a current larger than the current threshold is flowing out, and
With the function of the dead time compensating means stopped, the frequency / current gain of the inverter circuit is obtained by giving the control unit a sweep sine wave including a DC offset in an amount that does not switch between positive and negative as the current command value. A measuring means for measuring characteristics and
A specific means for specifying the frequency for calculating the set value used for calculating the set value based on the frequency / current gain characteristics measured by the measuring means, and a specific means for specifying the frequency for calculating the set value.
Using the resistance and inductance of the load to which the output of the inverter circuit is supplied, the alternating current applied to the load when an alternating current whose frequency is the frequency for calculating the set value and whose amplitude is the current threshold is energized. A calculation method for calculating the voltage amplitude and
A setting means for setting a voltage command value corresponding to the amplitude calculated by the calculation means as the set value of the dead time compensation means, and a setting means.
An inverter device characterized by being equipped with.

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