JP2011114936A - Method of controlling stepping motor with energy storage function, control unit of stepping motor with energy storage function, and electric on/off valve using stepping motor with energy storage function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of controlling a stepping motor with an energy storage function that shortens charge time to an energy storage means and includes a power failure countermeasure function for quickly coping with power failure or the like, and to provide a control unit of a stepping motor with the energy storage function and an electric on/off valve using a stepping motor with the energy storage function. <P>SOLUTION: In the method of controlling a stepping motor with the energy storage function with a stepping motor and the energy storage means, the stepping motor is driven and controlled by a drive current, the storage means is charged by a prescribed charge current when the stepping motor is driven, and the energy storage means is charged by a superposition charge current larger than the charge current when the stepping motor is not driven. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for controlling a stepping motor with a power storage function that can be driven for a certain period of time even when power is cut off due to a power failure using power storage means such as an electric double layer capacitor, and this stepping motor with a power storage function The present invention relates to an electric on / off valve having a power failure countermeasure function that automatically drives the electric on / off valve to a predetermined opening degree including full open and full open when power supply is interrupted due to a power failure.

Conventionally, an electric on-off valve that automatically drives a motor such as a stepping motor at the time of a power failure to close or open the on-off valve is known (Patent Documents 1 and 2).
As shown in FIG. 15, the electric on-off valve 100 includes a motor 102 that drives the electric on-off valve 100, a power storage unit 104 such as an electric double layer capacitor, a drive circuit 106 that directly controls the driving of the motor, A drive control unit 108 that outputs a drive signal related to closing and opening of the electric on-off valve to the drive circuit, a charge circuit 110 that controls charging of the power storage means, and a power supply circuit that outputs power to the drive circuit and the charge circuit 112. Note that the power supply circuit 112 includes a first power supply circuit 112a, a second power supply circuit 112b, and a third power supply circuit 112c.

  In such an electric on-off valve, as shown in FIG. 16, the current flowing from the power supply output VD to the drive circuit 106 to the motor and the current flowing from the output V1 of the power supply circuit 1 to the power storage means 104 are not linked.

  Then, the power storage means 104 is charged via the charging circuit during power supply, and when the power supply is cut off, such as a power failure, the motor is automatically closed by supplying power from the power storage means 104 to the motor. Or it is controlled to open the valve.

JP-A-11-101359 JP 2007-218433 A

  The conventional electric on-off valve 100 increases the resistance value of the load resistance of the charging circuit 110 so that the power supply capacity of the first power supply circuit 112a does not exceed even if the motor 102 is driven while the power storage means 104 is charged. As a result, as shown in FIG. 17, charging is performed by reducing the charging current to the power storage means 104.

For this reason, the time required for charging is as long as about 10 to 15 minutes, and it was not possible to cope with a power failure immediately after power feeding to the electric on-off valve 100 or a continuous power failure.
In view of such a current situation, the present invention reduces the charging time for the power storage means, and can quickly enter a state where it can cope with a power outage or the like. An object of the present invention is to provide a control device for an attached stepping motor and an electric on-off valve using the stepping motor with an electric storage function.

The present invention has been invented in order to achieve the above-described problems and objects in the prior art, and the method for controlling a stepping motor with a power storage function according to the present invention includes a stepping motor and power storage means. A method for controlling a stepping motor with a power storage function,
The stepping motor is driven and controlled by a driving current;
When driving the stepping motor, the storage means is charged with a predetermined charging current,
When the stepping motor is not driven, the power storage means is charged with a superimposed charging current larger than the charging current.

In the method for controlling a stepping motor with a power storage function according to the present invention, the stepping motor is driven and controlled by at least two-phase driving currents.
While driving the stepping motor, during the two-phase energization in the 1-2 phase excitation method, the power storage means is charged with a predetermined charging current,
When the stepping motor is driven and at least one-phase driving current is not used, the power storage means is charged with a supplementary charging current that is larger than the charging current and less than the superimposed charging current. And

  The method for controlling a stepping motor with a storage function according to the present invention is characterized in that the driving state of the stepping motor is detected based on a driving signal for controlling the driving current.

  Further, according to the method for controlling a stepping motor with a power storage function of the present invention, the calculation means for outputting the drive signal for controlling the drive current detects the driving state of the stepping motor and controls the charging of the power storage means. A charge signal is output.

In the control method of the stepping motor with a power storage function according to the present invention, the charge signal is a PWM (Pulse Width Modulation) signal.
Further, the control device for a stepping motor with a power storage function of the present invention is a control device for a stepping motor with a power storage function including a stepping motor and a power storage means,
A drive circuit for outputting a drive current for driving the stepping motor;
A drive control unit for outputting a drive signal for controlling the operation of the drive circuit;
A charging circuit that outputs a charging current for controlling charging of the power storage means;
A power supply circuit that outputs power to the drive circuit and the charging circuit,
When a driving current is output from the driving circuit, a predetermined charging current is output from the charging circuit to the storage means,
When a drive current is not output from the drive circuit, a superimposed charge current larger than a predetermined charge current is output from the charging circuit to the storage means.

In the control device for a stepping motor with a power storage function of the present invention, the drive current is at least a two-phase current,
At the time of two-phase energization in the 1-2 phase excitation method from the drive circuit, a predetermined charging current is output from the charging circuit to the storage means,
When a driving current of at least one phase is not output from the driving circuit, a supplementary charging current that is larger than the charging current and less than or equal to the superimposed charging current is output from the charging circuit to the power storage unit. .

  In the control device for a stepping motor with a power storage function according to the present invention, the charging circuit includes an addition charging circuit, and the superimposed charging current and the supplementary charging current are output by outputting the addition charging current from the addition charging circuit. Is output from the charging circuit.

In addition, the control device for a stepping motor with a power storage function according to the present invention detects a driving state of the stepping motor based on the driving signal.
Further, the control device for a stepping motor with a power storage function according to the present invention comprises a calculation means constituting the drive control unit,
Current adjusting means for controlling the operation of the charging circuit,
The calculating means detects a driving state of the stepping motor and outputs a charge signal for controlling charging of the power storage means to the current adjusting means.

  In the control device for a stepping motor with a power storage function according to the present invention, the current adjusting unit and the additional charging circuit are connected, and based on a charging signal output from the current adjusting unit, additional charging is performed in the additional charging circuit. The current value of the current is adjusted.

In the control device for a stepping motor with a power storage function according to the present invention, the charge signal is a PWM (Pulse Width Modulation) signal.
Moreover, the electric on-off valve of the present invention includes any one of the above-described control devices for the stepping motor with a power storage function.

  Moreover, the refrigeration cycle system of the present invention includes any one of the above-described control devices for the stepping motor with a power storage function.

  According to the present invention, since the driving current to the motor and the charging current to the power storage means are linked and the power storage means is charged with a large current when the motor is not driven, the power storage means is fully charged. It is possible to reduce the time required for

For this reason, the stepping motor can be driven for a certain period of time in response to a power failure immediately after power feeding to a device using a stepping motor such as an electric on-off valve or a continuous power failure.
In particular, when an electric on-off valve using such a stepping motor is used, the electric on-off valve is fully closed and fully opened by driving the stepping motor for a certain period of time even when power is cut off such as a power failure. It can be set as the electric on-off valve with the power failure countermeasure function which drives automatically so that it may become a predetermined opening degree.

FIG. 1 is a configuration diagram showing a system configuration of a first embodiment of a control device for a stepping motor with a power storage function according to the present invention. FIG. 2 is a circuit diagram of the control device of the stepping motor with a power storage function of FIG. FIG. 2A is an internal circuit diagram of a resistor-containing transistor using an npn junction bipolar transistor. FIG. 3 is a pattern diagram showing the relationship among the power output of the power supply circuit, the drive current, the charge current, and the charge amount when the power storage means is charged using the control device for the stepping motor with the power storage function of FIG. FIG. 4 is a configuration diagram showing a system configuration of a second embodiment of the control device for the stepping motor with a power storage function according to the present invention. FIG. 5 is a circuit diagram of the control device for the stepping motor with a power storage function of FIG. FIG. 6 is a pattern diagram showing the relationship among the power output of the power supply circuit, the drive current, the charge current, and the charge amount when the power storage means is charged using the control device for the stepping motor with the power storage function of FIG. FIG. 7 (a) is a graph showing the relationship between the voltage (V) of the power storage means 52 and the charging time, and FIG. 7 (b) shows from 0 second to 30 seconds in the graph of FIG. 7 (a). It is an enlarged graph. FIG. 8 is a configuration diagram showing a system configuration of a third embodiment of the control device for the stepping motor with a power storage function according to the present invention. FIG. 9 is a circuit diagram of the control device of the stepping motor with a power storage function of FIG. FIG. 10 is a diagram in which an output pattern when a four-phase stepping motor is driven by 1-2-phase excitation is associated with a table and an output waveform. FIG. 11 is a circuit diagram of a fourth embodiment of the control device for the stepping motor with a power storage function according to the present invention. FIG. 12 is a configuration diagram of a refrigeration cycle system using the control device for a stepping motor with a power storage function according to the present invention. 13 is an external view of an example of the control device of the present invention used in the refrigeration cycle system of FIG. 12, FIG. 13 (a) is a front view, FIG. 13 (b) is an upper side view, and FIG. 13 (c). Is a right side view, and FIG. 13 (d) is a lower side view. FIG. 14 is an external view of an example of an electric on-off valve used in the refrigeration cycle system of FIG. 12, FIG. 14 (a) is a front view, and FIG. 14 (b) is a right side view. FIG. 15 is a configuration diagram showing a system configuration of a conventional electric on-off valve with a power storage function. FIG. 16 is a circuit diagram of a conventional electric on-off valve with a power storage function. FIG. 17 is a pattern diagram showing the relationship among the power supply output of the power supply circuit, the drive current, the charge current, and the charge amount when the power storage means is charged in the conventional electric on-off valve with a power storage function.

Hereinafter, embodiments (examples) of the present invention will be described in more detail based on the drawings.
FIG. 1 is a block diagram showing a system configuration of a first embodiment of a control device for a stepping motor with a power storage function according to the present invention, and FIG. 2 is a circuit diagram of the control device for the stepping motor with a power storage function of FIG.

  As shown in FIGS. 1 and 2, the control device 10 for a stepping motor with a power storage function according to the present invention outputs a driving current and directly controls the driving of the stepping motor 50, and the driving circuit 12 A drive control unit 14 that outputs a drive signal related to the driving of the stepping motor 50, a charging circuit 15 that outputs a charging current and controls the charging of the power storage means 52, and an additional charge for performing additional charging to the power storage means 52 A circuit 18; a current adjusting unit 20 that controls the addition charging circuit 18 based on a drive signal; a drive circuit 12, a charging circuit 15, an addition charging circuit 18, and a power supply circuit 22 that outputs power to the storage circuit protection circuit 16. I have.

In the control device 10, the charging voltage V <b> 1 is output from the power supply circuit 22 for charging the power storage means 52, and the driving voltage VD is output from the power supply circuit 22 for driving the stepping motor 50. The charging voltage V1 is also input to the drive control unit 14 in order to detect a power failure.
In addition, since the voltage VC of the power storage unit 52 changes according to the amount of charge, the voltage VC of the power storage unit 52 is also input to the drive control unit 14 as a charge amount detection signal. The amount of charge of 52 can be detected sequentially.

  In this embodiment, a unipolar four-phase stepping motor is used as the stepping motor 50, and a 1-2 phase excitation signal is used as a drive signal. However, the type of the stepping motor 50 and the type of the drive signal are not limited to this. For example, another multi-phase stepping motor such as a 5-phase stepping motor may be used. Other excitation signals such as an excitation signal and a two-phase excitation signal may be used.

  The power storage means 52 is not particularly limited, and for example, a capacitor such as an electric double layer capacitor or a redox capacitor, a storage battery such as a lithium ion secondary battery or a lead storage battery, or the like can be used.

  The drive control unit 14 is configured by a calculation unit such as a CPU (Central Processing Unit), and outputs a drive signal according to a command related to a desired operation of the stepping motor 50.

  Further, the drive control unit 14 receives the constant voltage V1 from the power supply circuit 22 as a power failure detection signal. When the constant voltage V1 is no longer detected, the drive control unit 14 determines that a power failure has occurred and The drive signal is output so as to perform a predetermined operation.

  The power supply circuit 22 includes a first power supply circuit 22a for converting a power input from the outside into a voltage V1 (12V) used for driving the stepping motor 50 and charging the power storage means 52, a voltage V1 and a voltage V3 described later. The second power supply circuit 22b that converts the voltage VC of the power storage means 52 into the voltage V2 (3V) used for the operation of the drive control unit 14, the voltage VC of the power storage means 52 when the voltage V1 is not supplied due to a power failure or the like. It comprises a third power supply circuit 22c that converts the voltage V3 (12V) used for driving the stepping motor 50 and the second power supply circuit 22b.

  In the present embodiment, the third power supply circuit 22c is operated by the drive control unit 14, but a circuit that operates similarly is provided separately, and the third power supply circuit 22c is operated by the circuit. May be.

  Further, in the present embodiment, the drive control unit 14 is configured to determine the detection of a power failure or the like or the detection of the charge amount by an analog input to the drive control unit 14. A circuit that outputs a binary value as to whether or not a predetermined level has been reached may be provided separately so as to be determined by a normal I / O input.

  In the power supply circuit 22, the external power supply voltage input from the outside becomes a voltage suitable for driving the stepping motor 50, charging the power storage means 52, operation of the drive circuit 12, the charging circuit 15, and the power storage means protection circuit 16. It is converted as follows.

  Reference numeral 31 denotes a resistance-containing transistor using an npn junction bipolar transistor, as shown in FIG. This circuit is used as a switching device for current control. Of course, the switching device is not limited to this. For example, a single npn junction bipolar transistor or n-channel MOS-FET may be used. .

Reference numeral 32 denotes a resistor having a predetermined resistance value, reference numeral 34 denotes a diode, and reference numeral 36 denotes a Zener diode.
In the drawings, the same circuit symbols indicate the same kind of members, and the reference numerals are omitted. However, the electrical property values of the respective members are not necessarily the same, and may have different electrical property values.

  In the control device 10, as shown in the pattern diagram of FIG. 3, when the stepping motor 50 is driven, that is, when a driving current is output, only a small charging current from the charging circuit 12 is output. When the stepping motor 50 is not driven, i.e., when the driving current is not output, the charging means 52 is charged together with the charging current from the charging circuit 15 and the additional charging current from the additional charging circuit 18. Is added to charge the power storage means 52 with a large superimposed charging current.

  By performing such control, it is possible to use a surplus power output when charging the power storage means 52 when the stepping motor 50 is not driven, and without increasing the power capacity of the first power circuit 22a. In addition, the time required to fully charge the power storage means 52 can be shortened.

  In the present embodiment, the charging circuit 15 and the additional charging circuit 18 are configured as separate circuits, and the additional charging circuit 18 is controlled by the current adjusting means 20, but the charging circuit 15 and the additional charging circuit 18 are integrated. The charging current may be adjusted to the power storage means 52 by controlling the charging circuit by the current adjusting means 20.

  FIG. 4 is a block diagram showing a system configuration of a second embodiment of the control device for a stepping motor with a power storage function according to the present invention, and FIG. 5 is a circuit diagram of the control device for the stepping motor with a power storage function of FIG.

  The control device 10 for the stepping motor with a power storage function of this embodiment has basically the same configuration as the control device 10 for the stepping motor with a power storage function of the first embodiment. Reference numerals are assigned and detailed description thereof is omitted.

In the control device 10 for the stepping motor with a power storage function of this embodiment, the addition charging circuit 18 is provided in two systems.
With this configuration, as shown in the pattern diagram of FIG. 6, when the 1-2 phase excitation signal is output as the drive signal from the drive circuit 14, when the stepping motor 50 is not driven, That is, when the drive current is not output, the addition charging circuits 18a and 18b are operated in both systems, the power storage means 52 is charged with a large superimposed charging current, and the stepping motor 50 is driven. That is, when driving current is output, if both driving phases are energized, the charging means 52 is charged with a predetermined charging current without operating the addition charging circuits 18a and 18b. When only one phase of the drive current is applied, operating only one system out of the addition charging circuits 18a and 18b is larger than the charging current and the superimposed charging current. It is possible to perform charging of the power storage means 52 by the following supplement charging current.

  As described above, when charging is performed by operating only one system of the additional charging circuits 18a and 18b, the charging current is smaller than when charging is performed by operating both of the additional charging circuits 18a and 18b. Since additional charging can be performed even when the stepping motor 50 is in operation, the time required to fully charge the power storage means 52 can be shortened, and the efficiency of power supply utilization can be improved.

FIG. 7 (a) is a graph showing the relationship between the voltage (V) of the power storage means 52 and the charging time, and FIG. 7 (b) shows from 0 second to 30 seconds in the graph of FIG. 7 (a). It is an enlarged graph.
As shown in FIG. 7, while the conventional charging method requires about 900 seconds to fully charge the power storage means 52, the power is stored using the control device 10 of the first embodiment of the present invention. When the means is charged, it can be fully charged in about 90 seconds.

  Furthermore, when the power storage means 52 is charged using the control device 10 of the second embodiment of the present invention, it can be fully charged in about 75 seconds, compared with the conventional charging method. The charging of the power storage means 52 can be completed in about one-tenth of the time.

  In the control devices 10 of the first and second embodiments described above, the current adjustment means 20 controls the addition charging based on the drive signal. However, the present invention is not limited to this, and the charging output is controlled by software. Thus, addition charging can be controlled.

  FIG. 8 is a block diagram showing a system configuration of a third embodiment of the control device for the stepping motor with storage function according to the present invention, and FIG. 9 is a circuit diagram of the control device for the stepping motor with storage function in FIG.

  The control device 10 for the stepping motor with power storage function of this embodiment has basically the same configuration as the control device 10 for the stepping motor with power storage function of the first and second embodiments. The same reference numerals are assigned and detailed description thereof is omitted.

  In the control device 10 for the stepping motor with a power storage function of this embodiment, a charge signal is output from the drive control unit 14 to the current adjusting means, and a charge signal corresponding to the drive signal is determined by software.

  Specifically, for example, the correspondence between the drive signal and the charge signal as shown in Table 1 is created by software, and the charge signal corresponding to the drive signal corresponding to the drive of the stepping motor 50 is generated from the drive control unit 14. Is output, the addition charging circuit 18 can be operated.

なお、表１に示すような出力パターンは、図１０に示す駆動信号の出力波形にそれぞれ対応している。

The output patterns shown in Table 1 correspond to the output waveforms of the drive signals shown in FIG.

  The control device 10 using the software shown in FIGS. 8 and 9 and Table 1 has a configuration corresponding to the control device 10 shown in the second embodiment, but the charging signal output from the drive control unit 14 It is possible to adopt a configuration corresponding to the control device 10 shown in the first embodiment by creating a correspondence as shown in Table 2 by software with only one system.

図１１は、本発明の蓄電機能付きステッピングモーターの制御装置の第４の実施例の回路図である。

FIG. 11 is a circuit diagram of a fourth embodiment of the control device for the stepping motor with a power storage function according to the present invention.

  The control device for the stepping motor with power storage function of this embodiment has basically the same configuration as the control device for the stepping motor with power storage function of the first to third embodiments. The detailed description is abbreviate | omitted.

  In the control device for a stepping motor with a power storage function of this embodiment, the charge signal output from the drive control unit 14 is only one system, and the output signal is a PWM (Pulse Width Modulation) signal.

  Thus, when the charge signal is a PWM signal, the correspondence between the drive signal and the duty ratio of the PWM signal as shown in Table 3 is created by software, and is matched to the drive signal corresponding to the driving of the stepping motor. The addition charging circuit can be operated by outputting the PWM signal.

なお、この実施例のようにＰＷＭ信号によって加算充電回路の動作を制御する場合には、電源回路の電源容量の余剰に応じて２相通電時にもＰＷＭ信号のデューティー比を調整することによって、例えば、電源回路の電源容量に余裕がある場合には、表４のように２相通電時にもＰＷＭ信号のデューティー比を設定してやるなどして、さらに、蓄電手段を満充電とするまでに要する時間の短縮を図ることができる。

When the operation of the addition charging circuit is controlled by the PWM signal as in this embodiment, by adjusting the duty ratio of the PWM signal even during two-phase energization according to the surplus of the power supply capacity of the power supply circuit, for example, If the power supply capacity of the power supply circuit has a margin, the duty ratio of the PWM signal is set even during two-phase energization as shown in Table 4, and the time required to fully charge the power storage means is further increased. Shortening can be achieved.

図１２は、本発明のステッピングモーターの制御装置を用いた冷凍サイクルシステムの構成図、図１３は、図１２の冷凍サイクルシステムに用いられる本発明の制御装置の一例の外観図、図１４は、図１２の冷凍サイクルシステムで用いられる電動開閉弁の一例の外観図である。

12 is a configuration diagram of a refrigeration cycle system using the stepping motor control device of the present invention, FIG. 13 is an external view of an example of the control device of the present invention used in the refrigeration cycle system of FIG. 12, and FIG. It is an external view of an example of the electric on-off valve used with the refrigerating cycle system of FIG.

  As shown in FIG. 12, the refrigeration cycle system 60 includes a cooler 64 that cools the inside of the freezer 62, a compressor 66 that compresses low-pressure gas refrigerant sent from the cooler 64 into high-temperature and high-pressure gas, and a compressor 66. A condenser 68 that performs heat exchange of the high-temperature and high-pressure gas refrigerant sent from the motor, an electric on-off valve 70 that performs pressure reduction and flow control of the high-pressure liquid refrigerant sent from the condenser 68, and a distributor 72.

  This electric on-off valve 70 uses a stepping motor in the actuator part, and the opening degree of the on-off valve can be changed by the operation of the stepping motor. And in order to control the opening degree of this electric on-off valve 70, the control apparatus 10 of this invention is connected.

  As shown in FIG. 13, the control device 10 has a control circuit incorporated in a standard-sized terminal wiring board. On the operation surface side, an indicator 74 indicating a power application state, a storage state are displayed. An indicator 76, a function display 78 indicating the state of the control system, and a function setting operation button 80 are provided.

  Further, as shown in FIG. 14, the electric on-off valve 70 includes refrigerant pipes 70 a and 70 b through which refrigerant passes, and a connection cable 70 c that connects the stepping motor of the electric on-off valve 70 and the control device 10. The stepping motor is provided in the actuator part 70d of the electric on-off valve 70.

  By configuring in this way, even if the power supply is shut off due to a power failure or the like during operation of the freezer 62, the electric on-off valve 70 used as the expansion valve stops at the valve open position at the time of the power failure. Instead, the electric on-off valve 70 can be closed by the electric power stored in the power storage means 52.

  For this reason, it is possible to prevent the circulating refrigerant from accumulating as a liquid refrigerant in the cooler pipe in the cold freezer 70, and when the power failure is resolved and the operation is restarted in that state, It is possible to prevent the liquid refrigerant that has accumulated from flowing into the compressor 66 and damaging the compressor 66.

  In this way, by using the electric on-off valve 70 provided with the stepping motor control device 10 of the present invention, the degree of heating is controlled during normal operation, and the valve is closed during a power failure so that the liquid refrigerant is contained in the cooler pipe. Can be prevented.

  Conventionally, in order to prevent the liquid refrigerant from accumulating in the cooler piping as described above, a liquid supply electromagnetic valve (not shown) is provided together with the electric on-off valve 70. However, the configuration as in this embodiment is used. Thus, the refrigeration cycle system can be kept safe without providing a liquid supply solenoid valve, and the refrigeration cycle system can be simply configured.

  As described above, the preferred embodiment of the control device for the stepping motor with a power storage function of the present invention has been described. The stepping motor with a power storage function provided with such a control device is, for example, a valve such as an electric on-off valve or a refrigerator. It can also be used for automobile mechanisms such as dampers, louvers for air conditioners, drive-by-wire and steer-by-wire.

  The circuit of the control device described in the above embodiment is an example, and any circuit configuration can be used as long as the current related to the driving of the stepping motor and the current related to the charging of the power storage means can be controlled in conjunction with each other. Various modifications can be made without departing from the object of the present invention.

DESCRIPTION OF SYMBOLS 10 Control apparatus 12 Drive circuit 14 Drive control part 15 Charge circuit 16 Protection circuit 18 Addition charge circuit 18a Addition charge circuit 18b Addition charge circuit 20 Current adjustment means 22 Power supply circuit 30 Switching device 32 Resistor 34 Diode 36 Zener diode 50 Stepping motor 52 Power storage means 60 Refrigeration cycle system 62 Freezer 64 Cooler 66 Compressor 68 Condenser 70 Electric on-off valve 70a Refrigerant pipe 70b Refrigerant pipe 70c Connection cable 70d Actuator part 72 Distributor 74 Indicator 76 Indicator 78 Function display part 80 Function setting operation button 100 Electric On-off valve 102 Motor 104 Power storage means 106 Drive circuit 108 Drive control unit 110 Charging circuit 112 Power supply circuit

Claims (14)

A method for controlling a stepping motor with a power storage function including a stepping motor and a power storage means,
The stepping motor is driven and controlled by a driving current;
When driving the stepping motor, the storage means is charged with a predetermined charging current,
When the stepping motor is not driven, the power storage means is charged with a superimposed charging current larger than the charging current. The stepping motor is driven and controlled by at least two-phase driving current;
While driving the stepping motor, during the two-phase energization in the 1-2 phase excitation method, the power storage means is charged with a predetermined charging current,
When the stepping motor is driven and at least one-phase driving current is not used, the power storage means is charged with a supplementary charging current that is larger than the charging current and less than the superimposed charging current. The control method of the stepping motor with an electrical storage function according to claim 1.   The method for controlling a stepping motor with a power storage function according to claim 1 or 2, wherein a driving state of the stepping motor is detected based on a driving signal for controlling the driving current.   The calculation means for outputting a drive signal for controlling the drive current detects a drive state of the stepping motor and outputs a charge signal for controlling charging of the power storage means. A method for controlling a stepping motor with a power storage function described in 1.   5. The method for controlling a stepping motor with a power storage function according to claim 4, wherein the charging signal is a PWM (Pulse Width Modulation) signal. A control device for a stepping motor with a power storage function comprising a stepping motor and a power storage means,
A drive circuit for outputting a drive current for driving the stepping motor;
A drive control unit for outputting a drive signal for controlling the operation of the drive circuit;
A charging circuit that outputs a charging current for controlling charging of the power storage means;
A power supply circuit that outputs power to the drive circuit and the charging circuit,
When a driving current is output from the driving circuit, a predetermined charging current is output from the charging circuit to the storage means,
A control device for a stepping motor with a storage function, wherein a superimposed charging current larger than a predetermined charging current is output from a charging circuit to a storage means when a driving current is not output from the driving circuit. The drive current is at least two-phase current,
At the time of two-phase energization in the 1-2 phase excitation method from the drive circuit, a predetermined charging current is output from the charging circuit to the storage means,
When a driving current of at least one phase is not output from the driving circuit, a supplementary charging current that is larger than the charging current and less than or equal to the superimposed charging current is output from the charging circuit to the power storage unit. The control device for a stepping motor with a power storage function according to claim 6.   The charging circuit includes an addition charging circuit, and is configured to output the superimposed charging current and the supplementary charging current from the charging circuit by outputting the addition charging current from the addition charging circuit. The control device for a stepping motor with a power storage function according to claim 6 or 7.   9. The control device for a stepping motor with a storage function according to claim 6, wherein the driving state of the stepping motor is detected based on the driving signal. Arithmetic means constituting the drive control unit;
Current adjusting means for controlling the operation of the charging circuit,
9. The calculation means according to claim 6, wherein the calculation means detects a driving state of the stepping motor and outputs a charge signal for controlling charging of the power storage means to the current adjustment means. Stepping motor controller with power storage function.   11. The current adjustment means and an addition charging circuit are connected, and the current value of the addition charging current is adjusted in the addition charging circuit based on a charging signal output from the current adjustment means. Control device for stepping motor with power storage function described in 1.   The control device for a stepping motor with a power storage function according to claim 10 or 11, wherein the charging signal is a PWM (Pulse Width Modulation) signal.   An electric on-off valve comprising the control device for a stepping motor with a power storage function according to any one of claims 6 to 12.   A refrigeration cycle system comprising the control device for a stepping motor with a power storage function according to any one of claims 6 to 12.

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