JP2017195761A5

JP2017195761A5 -

Info

Publication number: JP2017195761A5
Application number: JP2017056464A
Authority: JP
Filing date: 2017-03-22
Publication date: 2019-06-06
Anticipated expiration: 2037-03-22

Description

本発明の一態様に係るモータ制御装置は、Ｈブリッジ回路を構成する複数のスイッチング素子を備え、モータの巻線が接続される駆動回路と、前記巻線に流れる駆動電流を検出する検出手段と、前記検出手段によって検出された駆動電流に基づいて、前記駆動回路を駆動する駆動電圧を生成する電圧生成手段と、前記複数のスイッチング素子のオン動作及びオフ動作を制御する第１のＰＷＭ信号及び第２のＰＷＭ信号を生成するパルス生成手段と、を有し、前記第１のＰＷＭ信号は、ハイレベルとローレベルとの一方である第１のレベルと前記ハイレベルと前記ローレベルとの他方である第２のレベルとで構成される信号であって、前記電圧生成手段によって生成された駆動電圧と第１の搬送波とに基づいて生成される信号であり、前記第２のＰＷＭ信号は、前記第１のレベルと前記第２のレベルとで構成される信号であって、前記電圧生成手段によって生成された駆動電圧と前記第１の搬送波の位相とは逆位相である第２の搬送波とに基づいて生成される信号であり、前記パルス生成手段によって生成された前記第１のＰＷＭ信号が前記第２のレベルであって、かつ、前記検出手段が前記駆動電流を検出するタイミングを含む第１の期間における前記駆動電圧は所定値より小さく、前記パルス生成手段によって生成された前記第２のＰＷＭ信号が前記第１のレベルであって、かつ、前記検出手段が前記駆動電流を検出するタイミングを含む第２の期間における前記駆動電圧は前記所定値より大きいことを特徴とする。 A motor control device according to one aspect of the present invention includes: a drive circuit to which a plurality of switching elements forming an H-bridge circuit are connected and to which a winding of a motor is connected; detection means for detecting a driving current flowing through the winding Voltage generation means for generating a drive voltage for driving the drive circuit based on the drive current detected by the detection means, a first PWM signal for controlling on and off operations of the plurality of switching elements, and Pulse generation means for generating a second PWM signal, the first PWM signal having one of a high level and a low level, a first level, and the other of the high level and the low level And a second level, which is a signal generated on the basis of the drive voltage generated by the voltage generation means and the first carrier, The PWM signal is a signal composed of the first level and the second level, and the drive voltage generated by the voltage generation means is in antiphase with the phase of the first carrier wave. A signal generated on the basis of a second carrier wave, the first PWM signal generated by the pulse generation means being at the second level, and the detection means detecting the drive current The driving voltage in the first period including the timing of occurrence is smaller than a predetermined value, the second PWM signal generated by the pulse generating means is at the first level, and the detecting means is the driving. The driving voltage in a second period including a timing of detecting a current is characterized by being larger than the predetermined value .

本発明の他の一態様に係るモータ制御装置は、Ｈブリッジ回路を構成する複数のスイッチング素子を備え、モータの巻線が接続される駆動回路と、前記巻線に流れる駆動電流を検出する検出手段と、前記検出手段によって検出された駆動電流に基づいて、前記駆動回路を駆動する駆動電圧を生成する電圧生成手段と、前記複数のスイッチング素子のオン動作及びオフ動作を制御する第１のＰＷＭ信号及び第２のＰＷＭ信号を生成するパルス生成手段と、を有し、前記第１のＰＷＭ信号は、ハイレベルとローレベルとの一方である第１のレベルと前記ハイレベルと前記ローレベルとの他方である第２のレベルとで構成される信号であって、前記電圧生成手段によって生成された第１の駆動電圧と搬送波とに基づいて生成され、ハイレベルの信号とローレベルの信号とで構成される信号であり、前記第２のＰＷＭ信号は、前記第１のレベルと前記第２のレベルとで構成される信号であって、前記第１の駆動電圧の極性とは逆極性である第２の駆動電圧と前記搬送波とに基づいて生成された第３のＰＷＭ信号の位相とは逆位相であるＰＷＭ信号であり、前記検出手段は、前記第１の駆動電圧が所定値以上である場合は、前記パルス生成手段が生成した前記第２のＰＷＭ信号が前記ハイレベルであるハイ期間に前記巻線に流れる駆動電流を検出し、前記第１の駆動電圧が前記所定値未満の場合は、前記パルス生成手段が生成した前記第１のＰＷＭ信号が前記ローレベルであるロー期間に前記駆動電流を検出することを特徴とする。 A motor control device according to another aspect of the present invention includes: a plurality of switching elements forming an H-bridge circuit; a drive circuit to which a winding of a motor is connected; and a detection for detecting a drive current flowing through the winding. Means, voltage generation means for generating a drive voltage for driving the drive circuit based on the drive current detected by the detection means, and first PWM for controlling the on / off operation of the plurality of switching elements Pulse generation means for generating a signal and a second PWM signal, wherein the first PWM signal has a first level which is one of a high level and a low level, the high level and the low level, and And a second level, which is the other of the two, and is generated based on the first drive voltage generated by the voltage generation means and the carrier wave, and is a high level signal. And the low level signal, the second PWM signal is a signal composed of the first level and the second level, and the first drive voltage It is a PWM signal which is the reverse phase of the phase of the 3rd PWM signal generated based on the 2nd drive voltage which is opposite to polarity, and the carrier wave, and the detection means is the first drive. When the voltage is equal to or higher than a predetermined value, the second PWM signal generated by the pulse generation means detects a drive current flowing through the winding during a high period when the high level is high, and the first drive voltage If less than the predetermined value, the drive current is detected during a low period in which the first PWM signal generated by the pulse generation unit is at the low level .

Claims

A drive circuit including a plurality of switching elements forming an H-bridge circuit and to which a winding of a motor is connected;
Detection means for detecting a drive current flowing through the winding;
Voltage generation means for generating a drive voltage for driving the drive circuit based on the drive current detected by the detection means;
Pulse generation means for generating a first PWM signal and a second PWM signal for controlling the on operation and the off operation of the plurality of switching elements;
Have
The first PWM signal is a signal composed of a first level which is one of a high level and a low level, and a second level which is the other of the high level and the low level, A signal generated based on the drive voltage generated by the voltage generation means and the first carrier,
The second PWM signal is a signal composed of the first level and the second level, and the driving voltage generated by the voltage generating means is opposite to the phase of the first carrier wave. A signal generated on the basis of a second carrier wave that is in phase;
A said pulse generating means and the first PWM signal is the second level generated by, and the driving voltage in the first period including the timing at which the detection means detects the drive current is a predetermined value Smaller than
The drive voltage in the second period including the timing at which the second PWM signal generated by the pulse generation means is at the first level and the detection means detects the drive current is the predetermined voltage. A motor control device characterized by being larger than the value .

The motor control device according to claim 1, wherein the first carrier wave is a triangular wave, and the second carrier wave is a triangular wave having an opposite phase to the phase of the triangular wave as the first carrier wave. .

The detection means
Wherein when detecting the drive current to the first period, the first pre-Symbol triangular wave as the first carrier after the PWM signal is switched from the first level to the second level Detects the drive current at the timing at which
Wherein when detecting the driving current in the second period, the second pre-Symbol triangular wave as the first carrier after the PWM signal is switched from the second level to the first level The motor control device according to claim 2 , wherein the drive current is detected at a timing when the first value becomes an extreme value.

Said voltage generating means, so that the deviation between the driving current to be supplied to the winding and the detected driving current by the detecting means becomes smaller, according to claim 1, wherein the benzalkonium generate the drive voltage The motor control device according to any one of to 3 .

It said detecting means, for each cycle of the first conveying wave motor control apparatus according to any one of claims 1 to 4, characterized in the Turkey detect the driving current.

The pulse generation means
A carrier generating means for generating the first conveying wave,
An inverting means for generating the second conveyance wave by the in response to a driving voltage generated by the voltage generating means, for inverting said first conveying wave phase,
Wherein when the driving voltage is larger than the predetermined value, the generating the second PWM signal driving voltage and by comparing the second conveying wave, when the driving voltage is smaller than the predetermined value, comparing means for generating the first PWM signal by comparing the driving voltage and the first conveying wave,
The motor control device according to any one of claims 1 to 5, comprising:

The comparison means generates the second PWM signal by comparing the drive voltage with the second carrier wave when the drive voltage is greater than 0, and when the drive voltage is less than 0, The motor control device according to claim 6, wherein the first PWM signal is generated by comparing the drive voltage with the first carrier wave.

If the first PWM signal is in the first level the plurality of switching elements is turned on,
If the first PWM signal is the second level of the plurality of switching elements is turned off,
If the second PWM signal is in the first level the plurality of switching elements is turned on,
If the second PWM signal is the second level of the plurality of switching elements is turned off,
It said detecting means, said first of said drive current when detecting the period or the second PWM signal PWM signal is in the first level is detected the drive current during the period is the first level of not inverting the polarity, wherein the first PWM signal is detected if the period or the second PWM signal is the second level is detected the drive current during the period is the second level The motor control device according to any one of claims 1 to 7 , wherein the polarity of the drive current is reversed.

The motor control device includes the pulse generation unit, the drive circuit, and the detection unit corresponding to each of the first phase and the second phase of the motor.
Conveying wave corresponding to the first phase is in synchronization with the conveyance wave corresponding to the second phase,
The detection means corresponding to the first phase detects a drive current flowing through the winding of the first phase,
The detection means corresponding to the second phase detects a drive current flowing through the winding of the second phase,
The motor control device further comprises:
The driving current flowing through the winding of the first phase detected by the detecting means corresponding to the first phase and the driving current flowing through the winding of the second phase detected by the detecting means corresponding to the second phase a phase determining means for determining a rotational phase of a rotor of the motor based on the current,
Drive flowing in the winding of the first phase and the winding of the second phase so that the deviation between the command phase representing the target phase of the rotor of the motor and the rotational phase determined by the phase determination means is reduced Control means for controlling the motor by controlling the current ;
The motor control device according to any one of claims 1 to 8, characterized in that it has a.

The motor control device according to any one of claims 1 to 9 , wherein the predetermined value is zero .

The drive circuit is
One end of the first switching element and one end of the second switching element are connected to the power supply,
One end of a third switching element is connected in series to the other end of the first switching element,
One end of a fourth switching element is connected in series to the other end of the second switching element,
A resistor is connected to the other end of the third switching element and the other end of the fourth switching element,
The resistor is grounded,
One end of the winding of the motor is connected to a lead connecting the first switching element and the third switching element, and the other end is connected to a lead connecting the second switching element and the fourth switching element The motor control device according to any one of claims 1 to 10 , wherein the motor control circuit is a circuit as described above.

The PWM signal generated by the pulse generation means is supplied to the first switching element and the fourth switching element,
The motor control according to claim 11 , wherein a PWM signal having a phase opposite to that of the PWM signal generated by the pulse generation means is supplied to the second switching element and the third switching element. apparatus.

The motor control device detects the value of the induced voltage induced in the winding of the first phase by the rotation of the rotor of the motor and the value of the induced voltage induced in the winding of the second phase. Means for determining an induced voltage determined based on the drive current detected by the means;
The phase determining means determines the rotational phase based on the value of the induced voltage in the first phase and the value of the induced voltage in the second phase determined by the induced voltage determining means. 10. A motor control device according to item 9 .

The motor control device is a current component of a current value represented in a rotational coordinate system based on the rotational phase such that a deviation between the command phase and the rotational phase determined by the phase determination means is reduced. the motor control device according to claim 9, wherein the controller controls the motor based on the torque current ingredient is a current component that generates torque before Symbol rotor Te.

A drive circuit including a plurality of switching elements forming an H-bridge circuit and to which a winding of a motor is connected;
Detection means for detecting a drive current flowing through the winding;
Voltage generation means for generating a drive voltage for driving the drive circuit based on the drive current detected by the detection means;
Pulse generation means for generating a first PWM signal and a second PWM signal for controlling the on operation and the off operation of the plurality of switching elements;
Have
The first PWM signal is a signal composed of a first level which is one of a high level and a low level, and a second level which is the other of the high level and the low level, A signal generated based on the first drive voltage generated by the voltage generation means and the carrier wave, and configured of a high level signal and a low level signal,
The second PWM signal is a signal composed of the first level and the second level, and a second drive voltage having a polarity opposite to that of the first drive voltage and the second drive signal. A PWM signal that is in antiphase with the phase of the third PWM signal generated based on the carrier wave,
When the first drive voltage is equal to or higher than a predetermined value , the detection means may drive current flowing through the winding during a high period when the second PWM signal generated by the pulse generation means is at the high level. And detecting the drive current during a low period in which the first PWM signal generated by the pulse generation unit is at the low level when the first drive voltage is less than the predetermined value.
A motor control device characterized in that.

Said detecting means, for each cycle of the transfer wave motor control device according to claim 15, characterized by detecting the drive current.

It said voltage generating means, so that the deviation between the driving current to be supplied to the winding and the detected driving current by the detecting means becomes smaller, to generate the first driving voltage,
The pulse generation means
Carrier generation means for generating a triangular wave as the carrier wave;
First inversion means for generating the second drive voltage by inverting the polarity of the first drive voltage according to the positive / negative polarity of the first drive voltage generated by the voltage generation means;
When the first drive voltage is 0 or more, the third PWM signal is generated by comparing the second drive voltage with the triangular wave, and the first drive voltage is negative. Comparing means for generating the first PWM signal by comparing the first drive voltage with the triangular wave;
When the first drive voltage is 0 or more, the second PWM signal is generated and output by inverting the phase of the third PWM signal generated by the comparison means. And second inverting means for outputting the first PWM signal without inverting the phase of the first PWM signal generated by the comparing means, when the driving voltage of
The motor control device according to claim 15 or 16 , characterized in that:

The motor control device according to any one of claims 15 to 17 , wherein the predetermined value is zero.

A conveyance roller for conveying the sheet;
A motor for driving the transport roller;
The motor control device according to any one of claims 1 to 18 , which controls the motor.
A sheet conveying apparatus comprising:

A document tray on which documents are loaded;
A conveyance unit configured to convey the document stacked on the document tray;
Reading means for reading an original manuscript transferred by the transfer unit,
A motor that drives a load ,
The motor control device according to any one of claims 1 to 18 , which controls the motor.
A document reading apparatus comprising:

A conveyance roller for conveying the recording medium;
An image forming unit configured to form an image on the recording medium conveyed by the conveyance roller;
A motor for driving the transport roller;
The motor control device according to any one of claims 1 to 18 , which controls the motor.
An image forming apparatus comprising:

An image forming apparatus for forming an image on a recording medium, comprising:
A motor that drives a load,
The motor control device according to any one of claims 1 to 18 , which controls the motor.
An image forming apparatus comprising: