CN110995074A - Motor control device and motor device - Google Patents

Motor control device and motor device Download PDF

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Publication number
CN110995074A
CN110995074A CN201910930992.0A CN201910930992A CN110995074A CN 110995074 A CN110995074 A CN 110995074A CN 201910930992 A CN201910930992 A CN 201910930992A CN 110995074 A CN110995074 A CN 110995074A
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China
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setting
motor control
input
motor
rotation
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CN110995074B (en
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浦上智之
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Nidec Techno Motor Corp
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Nidec Techno Motor Corp
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/30—Arrangements for controlling the direction of rotation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/08—Arrangements for controlling the speed or torque of a single motor

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

Provided are a motor control device and a motor device, which can restrain the situation that the number of electrified wires for switching the setting of a motor control part is increased. When a speed command signal (Vsp) having a voltage value equal to or greater than a1 st threshold (TH1) is input in a state where a power supply voltage is not input, and when the voltage value of the speed command signal (Vsp) is reduced to be lower than the 1 st threshold (TH1), a power storage unit (15) continues for a certain time or longer and outputs a Control Signal (CS) having a voltage value equal to or greater than the 1 st threshold (TH1) to a setting switching unit (111). After the voltage value of the speed command signal (Vsp) is lowered to be lower than a1 st threshold value (TH1), a power supply voltage is input. When a Control Signal (CS) having a voltage value equal to or greater than a1 st threshold value (TH1) is input in a state where a power supply voltage is input, a setting switching unit (111) switches the setting of a motor control unit (11).

Description

Motor control device and motor device
Technical Field
The invention relates to a motor control device and a motor device.
Background
Conventionally, in a DC motor driving device, a rotational speed command, a start/stop signal, a rotational direction signal, and a brake signal, which are transmitted from an upper controller, are input to a speed control circuit, and an energization signal for controlling a switching element is output from the speed control circuit (for example, patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 10-127079
However, in the conventional DC motor driving device, a dedicated current carrying wire is wired to input a rotation direction signal for switching the rotation direction of the motor to the speed control circuit. In other words, a dedicated current carrying line is wired to switch the setting of the speed control circuit. Therefore, the number of energization lines increases.
Disclosure of Invention
The present invention has been made in view of the above-described problems, and an object thereof is to provide a motor control device and a motor device that can suppress an increase in the number of energization lines for switching settings to a motor control unit.
An exemplary motor control device of the present invention includes a motor control unit, a1 st power supply wire, a 2 nd power supply wire, and a power storage unit. The motor control unit controls the motor. The 1 st power line inputs a power supply voltage to the motor control unit. The 2 nd power line inputs a speed command signal for controlling the rotation speed of the motor to the motor control unit. The power storage unit is connected to the 2 nd power line, and stores power upon receiving the speed command signal. The motor control unit includes a rotation control unit and a setting switching unit. When the speed command signal is input in a state where the power supply voltage is input to the motor control unit, the rotation control unit controls the rotation speed of the motor in accordance with the speed command signal. The setting switching unit switches the setting of the motor control unit. In a state where the power supply voltage is not input to the motor control unit, after the speed command signal having a voltage value equal to or greater than the 1 st threshold value is input to the motor control unit, if the voltage value of the speed command signal decreases to be lower than the 1 st threshold value, the power storage unit continues for a certain time or longer and outputs a control signal having a voltage value equal to or greater than the 1 st threshold value to the setting switching unit. After the voltage value of the speed command signal decreases to be lower than the 1 st threshold value, the power supply voltage is input to the motor control unit. The setting switching unit switches the setting of the motor control unit when the control signal having the voltage value equal to or greater than the 1 st threshold value is input in a state where the power supply voltage is input to the motor control unit.
An exemplary motor device of the present invention includes the motor control device and the motor.
Effects of the invention
According to the exemplary invention, it is possible to provide a motor control device and a motor device that can suppress an increase in the number of energization wires for switching settings to a motor control unit.
Drawings
Fig. 1 is a diagram showing a motor system according to embodiment 1 of the present invention.
Fig. 2 is a timing chart showing the power supply voltage, the speed command signal, and the control signal when the setting of the motor control unit is switched to the 1 st setting in the motor system according to embodiment 1.
Fig. 3 is a timing chart showing the power supply voltage, the speed command signal, and the control signal when the setting of the motor control unit is switched to the 2 nd setting in the motor system according to embodiment 1.
Fig. 4 is a circuit diagram showing a power storage unit of the motor system of embodiment 1.
Fig. 5 is a flowchart showing the operation of the motor system according to embodiment 1.
Fig. 6 is a diagram showing a motor system according to modification 1 of embodiment 1.
Fig. 7 is a diagram showing a motor system according to modification 2 of embodiment 1.
Fig. 8 is a diagram showing a motor system according to embodiment 2 of the present invention.
Fig. 9 is a timing chart showing the power supply voltage, the speed command signal, and the control signal when the setting of the motor control unit is switched to the 1 st setting in the motor system according to embodiment 2.
Fig. 10 is a timing chart showing the power supply voltage, the speed command signal, and the control signal when the setting of the motor control unit is switched to the 2 nd setting in the motor system of embodiment 2.
Fig. 11 is a flowchart showing the operation of the motor system according to embodiment 2.
Description of the reference symbols
1: a motor control device; 11: a motor control unit; 111: a setting switching unit; 111 a: a rotation direction switching unit; 111 b: a rotation output switching unit; 117: a power input switching unit; FL: 1 st electrifying wire; SL: a 2 nd electrifying wire; m: a motor; b1: motor device
Detailed Description
Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and description thereof will not be repeated.
(embodiment mode 1)
A motor system a1 according to embodiment 1 of the present invention will be described with reference to fig. 1 to 5. First, referring to fig. 1, a motor system a1 will be described.
Fig. 1 is a diagram showing a motor system a 1. The motor system a1 is mounted on an electronic device (not shown). As shown in fig. 1, the motor system a1 has a motor arrangement B1 and a controller B2. The motor device B1 includes a motor M and a motor control device 1. The motor M rotates. In embodiment 1, the motor M is a three-phase brushless motor, and has a U phase, a V phase, and a W phase. The type of the motor M is only an example, and is not particularly limited.
The motor control device 1 controls the motor M. The motor control device 1 includes a motor control unit 11. The motor control unit 11 is, for example, a driver including a driver IC (Integrated Circuit) or a microcomputer. The motor control unit 11 controls the motor M. The motor control unit 11 rotates the motor M in the 1 st rotation direction and the 2 nd rotation direction opposite to the 1 st rotation direction. The 1 st rotation direction is, for example, a normal rotation direction. The 2 nd rotation direction is, for example, a reverse rotation direction.
The motor control device 1 further has an inverter 13. The motor control unit 11 controls the motor M via the inverter 13. Specifically, the motor control unit 11 outputs a plurality of PWM (Pulse Width Modulation) signals to the inverter 13. The inverter 13 generates a plurality of drive signals U, V, W from the plurality of PWM signals. The inverter 13 supplies the plurality of drive signals U, V, W to the motor M. The inverter 13 has, for example, 6 transistors (not shown). The motor M rotates in response to a plurality of drive signals U, V, W.
The motor control device 1 further includes a1 st energization line FL and a 2 nd energization line SL. The 1 st power supply line FL and the 2 nd power supply line SL are connected to the motor control device 1 and the controller B2.
The controller B2 controls the motor arrangement B1. Specifically, the controller B2 controls the motor control unit 11. The motor control unit 11 controls the inverter 13 under the control of the controller B2, and as a result, controls the rotation of the motor M.
The controller B2 includes a power supply unit 3 and a microcomputer 5. The microcomputer 5 controls the power supply section 3. The power supply unit 3 generates a power supply voltage Vcc and a speed command signal Vsp under the control of the microcomputer 5. The speed command signal Vsp controls the rotation speed of the motor M. The speed command signal Vsp controls switching of settings for the motor control unit 11. In embodiment 1, the speed command signal Vsp is an analog signal. The power supply section 3 includes, for example, a power supply circuit that generates a power supply voltage Vcc and a speed command signal Vsp. The power supply unit 3 includes, for example, a1 st power supply circuit that generates a power supply voltage Vcc and a 2 nd power supply circuit that generates a speed command signal Vsp.
Specifically, the 1 st current carrying line FL and the 2 nd current carrying line SL are connected to the power supply unit 3 and the motor control unit 11.
Then, the power supply unit 3 outputs the power supply voltage Vcc to the 1 st power supply line FL. As a result, the 1 st power supply line FL inputs the power supply voltage Vcc to the motor control unit 11. The motor control unit 11 operates using power based on the power supply voltage Vcc.
The power supply unit 3 outputs a speed command signal Vsp to the 2 nd power supply line SL. As a result, the 2 nd current supply line SL inputs the speed command signal Vsp to the motor control unit 11. The motor control unit 11 controls the motor M via the inverter 13 so that the rotation speed of the motor M becomes the rotation speed indicated by the speed command signal Vsp. As a result, the motor M rotates at the rotation speed indicated by the speed command signal Vsp.
The power supply voltage Vcc is greater than the voltage value of the speed command signal Vsp. The power supply voltage Vcc is, for example, 15V.
The motor control device 1 further includes a power storage unit 15 and a control signal line CL. Power storage unit 15 is connected to 2 nd power supply line SL. Then, the 2 nd energization line SL inputs the speed command signal Vsp to the power storage unit 15. As a result, power storage unit 15 receives speed command signal Vsp and stores the speed command signal Vsp. The power storage unit 15 is connected to a control signal line CL. Details of the power storage unit 15 and the control signal line CL will be described later.
With reference to fig. 1, the motor control unit 11 will be described in detail. The motor control unit 11 includes a setting switching unit 111 and a rotation control unit 113. The rotation control unit 113 is connected to the 2 nd power line SL. When the speed command signal Vsp is input to the rotation control unit 113 in a state where the power supply voltage Vcc is input to the motor control unit 11, the rotation control unit 113 controls the rotation speed of the motor M in accordance with the speed command signal Vsp. Specifically, the rotation control unit 113 controls the rotation speed of the motor M via the inverter 13 based on the speed command signal Vsp.
The setting switching unit 111 is connected to the control signal line CL. The setting switching unit 111 switches the setting of the motor control unit 11 in response to a control signal CS output from the power storage unit 15 to the control signal line CL.
Specifically, when the control signal CS having a voltage value lower than the 1 st threshold TH1 is input to the setting switching unit 111 in a state where the power supply voltage Vcc is input to the motor control unit 11, the setting switching unit 111 switches the setting of the motor control unit 11 to the 1 st setting. The 1 st threshold TH1 is, for example, 2V.
On the other hand, when the control signal CS having a voltage value equal to or greater than the 1 st threshold TH1 is input to the setting switching unit 111 in a state where the power supply voltage Vcc is input to the motor control unit 11, the setting switching unit 111 switches the setting for the motor control unit 11 to the 2 nd setting. The 2 nd setting is different from the 1 st setting.
The setting switching unit 111 includes a setting holding unit 1111. The setting holding unit 1111 holds the setting of the motor control unit 11. Specifically, when the setting switching unit 111 switches the setting of the motor control unit 11, the setting holding unit 1111 holds the switched setting. The motor control unit 11 operates according to the setting held by the setting holding unit 1111. On the other hand, when the supply of the power supply voltage Vcc to the motor control unit 11 is stopped or the speed command signal Vsp to the motor control unit 11 is stopped, the setting holding unit 1111 resets the held setting.
In embodiment 1, "setting" means "setting of the motor control unit 11". In other words, "setting" means "setting relating to the motor M".
Next, referring to fig. 1 and 2, control when the setting of the motor control unit 11 is switched to the 1 st setting will be described. Fig. 2 is a timing chart showing the power supply voltage Vcc, the speed command signal Vsp, and the control signal CS when the setting of the motor control unit 11 is switched to the 1 st setting. In fig. 2, the vertical axis shows the potential of the 1 st current-carrying line FL, the potential of the 2 nd current-carrying line SL, and the potential of the control signal line CL. In addition, the horizontal axis represents time.
As shown in fig. 1 and 2, at time t1, power supply voltage Vcc is input to motor control unit 11 from power-supply line 1 FL. At a time before time t1, the 1 st energization line FL has a potential Vcc 0. Potential Vcc0 is less than supply voltage Vcc. The potential Vcc0 is, for example, 0V.
The potential Vcc0 is different from the power supply voltage Vcc in that it cannot supply power for operating the motor control unit 11. The state where the 1 st power supply line FL has the potential Vcc0 indicates that the supply of the power supply voltage Vcc to the motor control unit 11 is stopped. That is, the state where the 1 st power supply line FL has the potential Vcc0 indicates that the power supply voltage Vcc is off. On the other hand, the state where the power supply voltage Vcc is input to the 1 st power-on line FL indicates that the power supply voltage Vcc is on.
At a time t2 after the time t1, the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input to the motor control unit 11 from the 2 nd power supply line SL. Therefore, the power storage unit 15 outputs the control signal CS having a voltage value lower than the 1 st threshold TH1 to the setting switching unit 111 via the control signal line CL. At time t2, power supply voltage Vcc is input to motor control unit 11 from power-supply line 1 FL.
At a time before the time t2, the 2 nd energization line SL has a potential Vsp 0. The potential Vsp0 is smaller than the voltage value of the speed command signal Vsp. The potential Vsp0 is, for example, 0V. The potential Vsp0 differs from the speed command signal Vsp in that it does not control the rotation speed of the motor M and does not control the switching of the setting of the motor control unit 11. The state where the 2 nd power supply line SL has the potential Vsp0 indicates that the input of the speed command signal Vsp is stopped. That is, the state where the 2 nd power supply line SL has the potential Vsp0 indicates that the speed command signal Vsp is off. On the other hand, a state where the speed command signal Vsp is input to the 2 nd conduction line SL indicates that the speed command signal Vsp is on.
At time t2, when power supply voltage Vcc is input, control signal CS having a voltage value lower than 1 st threshold TH1 is input, and therefore setting switching unit 111 switches the setting of motor control unit 11 to the 1 st setting. As a result, the setting of the motor control unit 11 is determined, and the setting holding unit 1111 holds the 1 st setting.
After the setting of the motor control unit 11 is determined, the speed command signal Vsp having a voltage value equal to or higher than the 1 st threshold TH1 is input to the rotation control unit 113 from the 2 nd conduction line SL. Then, the rotation control unit 113 controls the rotation speed of the motor M in accordance with the speed command signal Vsp.
In the example of fig. 2, the voltage value of the speed command signal Vsp and the voltage value of the control signal CS are substantially the same.
As described above with reference to fig. 1 and 2, in embodiment 1, the setting of motor control unit 11 can be switched to the 1 st setting in accordance with the state changes of power supply voltage Vcc and speed command signal Vsp.
Specifically, in embodiment 1, the setting of the motor control unit 11 is switched to the 1 st setting by controlling the power supply voltage Vcc and the speed command signal Vsp. Therefore, the motor control device 1 does not have a dedicated current carrying wire for switching the setting of the motor control unit 11 to the 1 st setting. In other words, the 1 st power supply line FL to which the power supply voltage Vcc is input and the 2 nd power supply line SL to which the speed command signal Vsp is input are substituted for the power supply line for switching the setting of the motor control unit 11 to the 1 st setting. Therefore, the motor device B1 and the motor control device 1 can suppress an increase in the number of energization wires for switching the setting of the motor control unit 11.
Next, referring to fig. 1 and 3, control when the setting of the motor control unit 11 is switched to the 2 nd setting will be described. Fig. 3 is a timing chart showing the power supply voltage Vcc, the speed command signal Vsp, and the control signal CS when the setting of the motor control unit 11 is switched to the 2 nd setting. In fig. 3, the vertical axis shows the potential of the 1 st current-carrying line FL, the potential of the 2 nd current-carrying line SL, and the potential of the control signal line CL. In addition, the horizontal axis represents time.
As shown in fig. 1 and 3, at time t3, the speed command signal Vsp is input to the motor control unit 11 from the 2 nd power supply line SL. Therefore, the power storage unit 15 outputs the control signal CS having a voltage value equal to or higher than the 1 st threshold TH1 to the setting switching unit 111 via the control signal line CL. In addition, at a time before the time t3, the 2 nd energization line SL has a potential Vsp 0. At time t3, the 1 st power supply line FL has the potential Vcc0, and therefore the power supply voltage Vcc is not input.
At a time t4 after the time t3, the voltage value of the speed command signal Vsp of the 2 nd energization line SL decreases to be lower than the 1 st threshold TH 1. The voltage value of the reduced speed command signal Vsp is greater than the potential Vsp 0. Time t4 represents when the voltage value of speed command signal Vsp starts to decrease.
On the other hand, from time t3 to time t4, power storage unit 15 stores power. Therefore, at time t4, when the voltage value of the speed command signal Vsp decreases to be lower than the 1 st threshold TH1, the power storage unit 15 discharges to the control signal line CL from time t 4. As a result, power storage unit 15 outputs control signal CS having a decreased voltage value to control signal line CL from time t 4. In this case, the power storage unit 15 continues for a predetermined time P or more from time t4 and outputs the control signal CS having a voltage value of 1 st threshold TH1 or more to the control signal line CL. Therefore, at time t5, the voltage value of the control signal CS is equal to or greater than the 1 st threshold TH1 in the state where the power supply voltage Vcc is input to the 1 st power-on line FL. As a result, the setting switching unit 111 switches the setting for the motor control unit 11 to the 2 nd setting. Then, at time t5, the setting for the motor control unit 11 is determined, and the setting holding unit 1111 holds the 2 nd setting.
Although not shown in the drawings for simplicity, after the setting of the motor control unit 11 is determined, the speed command signal Vsp having a voltage value equal to or higher than the 1 st threshold TH1 is input to the rotation control unit 113 from the 2 nd conduction line SL. Then, the rotation control unit 113 controls the rotation speed of the motor M in accordance with the speed command signal Vsp. When the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input, the rotation control unit 113 does not perform control of the rotation speed of the motor M based on the speed command signal Vsp.
In the example of fig. 3, the voltage value of the speed command signal Vsp and the voltage value of the control signal CS are substantially the same from time t3 to time t 4. After time t5, power storage unit 15 is also discharged, and the voltage value of speed command signal Vsp and the voltage value of control signal CS are substantially the same.
As described above with reference to fig. 1 and 3, in embodiment 1, the setting of the motor control unit 11 can be switched to the 2 nd setting in accordance with the state change of the power supply voltage Vcc and the speed command signal Vsp such as "the state where the power supply voltage Vcc is not input → the state where the speed command signal Vsp of the 1 st threshold TH1 or more is input → the state where the speed command signal Vsp is lowered to be lower than the 1 st threshold TH1 → the state where the power supply voltage Vcc is input".
Specifically, in embodiment 1, in a state where the power supply voltage Vcc is not input to the motor control unit 11 from the 1 st power supply line FL, after the speed command signal Vsp having the voltage value equal to or higher than the 1 st threshold TH1 is input to the motor control unit 11 from the 2 nd power supply line SL, when the voltage value of the speed command signal Vsp is decreased to be lower than the 1 st threshold TH1, the power storage unit 15 continues for the certain time P or longer through the control signal line CL, and outputs the control signal CS having the voltage value equal to or higher than the 1 st threshold TH1 to the setting switching unit 111.
Then, after the voltage value of the speed command signal Vsp is lowered to be lower than the 1 st threshold TH1, the power supply voltage Vcc is input to the motor control unit 11 from the 1 st power supply line FL.
Further, when the control signal CS having a voltage value of not less than the 1 st threshold TH1 is input to the setting switching unit 111 from the control signal line CL in a state where the power supply voltage Vcc is input to the motor control unit 11, the setting switching unit 111 switches the setting of the motor control unit 11 to the 2 nd setting.
Therefore, in embodiment 1, the motor control device 1 does not have a dedicated current carrying wire for switching the setting of the motor control unit 11 to the 2 nd setting. In other words, the 1 st power supply line FL to which the power supply voltage Vcc is input and the 2 nd power supply line SL to which the speed command signal Vsp is input are applied instead of the power supply line for switching the setting of the motor control unit 11 to the 2 nd setting. Therefore, the motor device B1 and the motor control device 1 can further suppress an increase in the number of current carrying wires for switching the setting of the motor control unit 11.
Further, according to embodiment 1, in a state where the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input to the rotation control unit 113, the control signal CS is input to the setting switching unit 111. Therefore, the setting switching unit 111 switches the setting of the motor control unit 11 in a state where the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input to the rotation control unit 113. As a result, during the rotation of the motor M, it is possible to suppress the switching of the setting of the motor control unit 11 by the speed command signal Vsp having a voltage value equal to or higher than the 1 st threshold TH 1.
In embodiment 1, for example, when the input of the power supply voltage Vcc to the motor control unit 11 is stopped before time t3, the setting switching unit 111 resets the setting for the motor control unit 11. Specifically, when the input of the power supply voltage Vcc is stopped, the setting switching unit 111 resets the setting held by the setting holding unit 1111.
After the setting of the motor control unit 11 is reset, as shown in fig. 3, in a state where the power supply voltage Vcc is not input to the motor control unit 11, after the speed command signal Vsp having a voltage value equal to or greater than the 1 st threshold TH1 is input from the 2 nd power supply line SL to the motor control unit 11, when the voltage value of the speed command signal Vsp is decreased to be lower than the 1 st threshold TH1, the power storage unit 15 continues for a certain time period P or more via the control signal line CL and outputs the control signal CS having a voltage value equal to or greater than the 1 st threshold TH1 to the setting switching unit 111. As a result, the setting switching unit 111 switches the setting for the motor control unit 11 to the 2 nd setting.
That is, in embodiment 1, after the setting of the motor control unit 11 is reset, the control signal CS having a voltage value equal to or greater than the 1 st threshold TH1 is output to the setting switching unit 111, and the setting of the motor control unit 11 is switched to the 2 nd setting. Therefore, it is possible to suppress the setting of the motor control unit 11 from being switched to the 2 nd setting during the rotation of the motor M.
Next, details of power storage unit 15 will be described with reference to fig. 3 and 4. Fig. 4 is a circuit diagram showing power storage unit 15. As shown in fig. 4, power storage unit 15 includes diode 151 and a plurality of capacitors 153. In embodiment 1, power storage unit 15 includes two capacitors 153. Further, the power storage unit 15 may have one capacitor 153.
The anode of the diode 151 is connected to the 2 nd conduction line SL. The cathode of the diode 151 is connected to the control signal line CL. The plurality of capacitors 153 are connected in parallel to the control signal line CL. Specifically, one electrode of each capacitor 153 is connected to the control signal line CL. The other electrode of each capacitor 153 is grounded.
When the speed command signal Vsp is input to the 2 nd power supply line SL, the diode 151 causes a current to flow from the 1 st power supply line FL to the control signal line CL. Therefore, the potential of the control signal line CL is substantially the same as the voltage value of the speed command signal Vsp. The potential of the control signal line CL becomes the control signal CS.
While the speed command signal Vsp is input to the 2 nd power supply line SL, each capacitor 153 stores power. Therefore, the potential of each capacitor 153 is substantially the same as the voltage value of the speed command signal Vsp. For example, at time t3 to time t4, each capacitor 153 stores electric power.
Then, when the voltage value of the speed command signal Vsp decreases, the respective capacitors 153 start discharging. Therefore, the potential of the control signal line CL decreases in response to a decrease in the voltage value of the speed command signal Vsp. That is, the voltage value of the control signal CS decreases in response to a decrease in the voltage value of the speed command signal Vsp. For example, the voltage value of the control signal CS decreases from time t 4.
The capacitance of the capacitor 153 is set so that the control signal CS having a voltage value equal to or higher than the 1 st threshold TH1 can be continuously output for a certain time P or longer after the voltage value of the speed command signal Vsp decreases.
As described above with reference to fig. 4, according to embodiment 1, power storage unit 15 can be formed using inexpensive and simple electronic components and circuit configurations (diode 151 and capacitor 153).
Next, with reference to fig. 1 and 5, the operation of the motor system a1 when the setting of the motor control unit 11 is switched to the 2 nd setting will be described. Fig. 5 is a flowchart showing the operation of the motor control device 1. As shown in fig. 5, the motor system a1 executes each process of steps S1 to S6.
As shown in fig. 1 and 5, in step S1, the power supply unit 3 inputs the speed command signal Vsp having a voltage value equal to or greater than the 1 st threshold TH1 from the 2 nd power supply line SL in a state where the power supply voltage Vcc is not input from the 1 st power supply line FL to the motor control unit 11.
In step S2, the power supply unit 3 decreases the voltage value of the speed command signal Vsp input to the motor control unit 11 to be lower than the 1 st threshold TH 1.
In step S3, power storage unit 15 outputs control signal CS having a voltage value equal to or higher than 1 st threshold TH1 to setting switching unit 111 for a fixed time period P or longer.
In step S4, the setting switch 111 determines whether or not the control signal CS having a voltage value equal to or greater than the 1 st threshold TH1 is input in a state where the power supply voltage Vcc is input.
If the determination at step S4 is negative, the process proceeds to step S1.
On the other hand, if the determination in step S4 is positive, the process proceeds to step S5. "determination affirmative" indicates that it is determined that the control signal CS having the voltage value of the 1 st threshold TH1 or more is input in the state where the power supply voltage Vcc is input.
In step S5, the setting switching unit 111 switches the setting for the motor control unit 11 to the 2 nd setting.
In step S6, the rotation control unit 113 controls the rotation speed of the motor M in accordance with the speed command signal Vsp.
As described above with reference to fig. 5, according to embodiment 1, the setting of the motor control unit 11 can be switched to the 2 nd setting by controlling the input timing of the power supply voltage Vcc and the speed command signal Vsp. Therefore, in the motor system a1, the number of current carrying wires for switching the setting of the motor control unit 11 can be suppressed from increasing.
(modification 1)
A1 st modification of embodiment 1 of the present invention will be described with reference to fig. 2, 3, and 6. The motor system a1 of modification 1 differs from embodiment 1 described with reference to fig. 1 to 5 mainly in that the setting of the motor control unit 11 indicates "setting of the rotation direction of the motor M" and "setting of the output form of the rotation signal PG indicating the rotation speed of the motor M". Hereinafter, differences between the first modification 1 and embodiment 1 will be mainly described.
Fig. 6 is a diagram showing a motor system a1 of modification 1. As shown in fig. 6, the motor control device 1 of modification 1 includes a rotational position detection unit SN in addition to the configuration of the motor control device 1 described with reference to fig. 1. The rotational position detector SN detects the rotational position of a rotor (not shown) of the motor M. Then, the rotational position detection unit SN outputs the rotational position signal RP to the motor control unit 11. The rotational position signal RP indicates the rotational position of the rotor of the motor M. In embodiment 1, the rotational position detection unit SN includes a plurality of hall elements. The plurality of hall elements detect magnetic pole positions of the rotor. The rotation control unit 113 controls the rotation speed of the motor M via the inverter 13 based on the speed command signal Vsp and the rotation position signal RP.
The motor control device 1 of modification 1 includes two power storage units 15 and two control signal lines CL separated from each other. Each power storage unit 15 is connected to the 2 nd power supply line SL. Then, the 2 nd power supply line SL inputs the speed command signal Vsp to each power storage unit 15. As a result, each power storage unit 15 receives the speed command signal Vsp and stores the speed command signal Vsp. Each power storage unit 15 is connected to a control signal line CL.
The motor control unit 11 of the motor control device 1 includes a rotation signal output unit 115 in addition to the configuration of the motor control unit 11 described with reference to fig. 1. The rotation signal output unit 115 converts the rotation position signal RP indicating the rotation position detected by the rotation position detection unit SN into the rotation signal PG and outputs the rotation signal PG to the microcomputer 5. The rotation signal PG indicates the rotation speed of the motor M.
The setting switching unit 111 of the motor control unit 11 includes a rotation output switching unit 111 b. The rotation output switching unit 111b switches the setting of the output form of the rotation signal PG. The output form of the rotation signal PG means an expression form of the rotation speed of the motor M indicated by the rotation signal PG. The rotation output switching unit 111b is connected to the control signal line CL. The rotation output switching unit 111b switches the setting of the output form of the rotation signal PG in response to the control signal CS output from the power storage unit 15b of the two power storage units 15 to the control signal line CL.
Specifically, as described below, the setting of the output form of the rotation signal PG is switched to the 1 st output form.
That is, when the control signal CS having a voltage value lower than the 1 st threshold TH1 is input to the rotation output switching unit 111b in a state where the power supply voltage Vcc is input to the motor control unit 11, the rotation output switching unit 111b switches the output format of the rotation signal PG to the 1 st output format. Therefore, according to the modification 1, the 1 st power supply line FL to which the power supply voltage Vcc is input and the 2 nd power supply line SL to which the speed command signal Vsp is input are used instead of the power supply line for switching the setting of the output form of the rotation signal PG to the 1 st output form. As a result, the motor device B1 and the motor control device 1 can suppress an increase in the number of current carrying lines for switching the setting of the output form of the rotation signal PG.
More specifically, the rotation output switching unit 111b switches the output format of the rotation signal PG to the 1 st output format in the same procedure as when the setting switching unit 111 described with reference to fig. 2 switches the setting of the motor control unit 11 to the 1 st setting. Therefore, in modification 1, the rotation output switching unit 111b is replaced with the "rotation output switching unit 111 b" and the "power storage unit 15" is replaced with the "power storage unit 15 b" in the description of fig. 2 in embodiment 1. Note that the "setting holding unit 1111" is referred to as "setting holding unit 1111 b" instead, the "setting for the motor control unit 11" is referred to as "setting of the output format of the rotation signal PG" instead, and the "1 st setting" is referred to as "1 st output format" instead.
On the other hand, as described below, the setting of the output form of the rotation signal PG is switched to the 2 nd output form. The 2 nd output form is different from the 1 st output form.
That is, when the control signal CS having a voltage value equal to or greater than the 1 st threshold TH1 is input to the setting switching unit 111 in a state where the power supply voltage Vcc is input to the motor control unit 11, the setting switching unit 111 switches the setting of the output form of the rotation signal PG to the 2 nd output form. Therefore, according to modification 1, the 1 st power supply line FL to which the power supply voltage Vcc is input and the 2 nd power supply line SL to which the speed command signal Vsp is input are used instead of the power supply line for switching the setting of the output form of the rotation signal PG to the 2 nd output form. As a result, the motor device B1 and the motor control device 1 can further suppress an increase in the number of energization lines for switching the setting of the output form of the rotation signal PG.
Specifically, the rotation output switching unit 111b switches the output format of the rotation signal PG to the 2 nd output format in the same procedure as when the setting switching unit 111 described with reference to fig. 3 and 5 switches the setting of the motor control unit 11 to the 2 nd setting.
Therefore, according to the 1 st modification, in a state where the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input to the rotation control unit 113, the control signal CS is input to the rotation output switching unit 111 b. As a result, in a state where the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input to the rotation control unit 113, the rotation output switching unit 111b switches the output format of the rotation signal PG to the 2 nd output format. Therefore, during the rotation of the motor M, it is possible to suppress switching of the output form of the rotation signal PG by the speed command signal Vsp having a voltage value equal to or greater than the 1 st threshold TH 1.
In modification 1, the rotation output switching unit 111b is replaced with the "rotation output switching unit 111 b" and the "power storage unit 15" is replaced with the "power storage unit 15 b" in the description of fig. 3 and 5 in embodiment 1. Note that the "setting holding unit 1111" is referred to as "setting holding unit 1111 b" instead, the "setting for the motor control unit 11" is referred to as "setting of the output format of the rotation signal PG" instead, and the "2 nd setting" is referred to as "2 nd output format" instead.
The rotation output switching unit 111b includes a setting holding unit 1111 b. The setting holding unit 1111b holds the setting of the output form of the rotation signal PG. Specifically, when the rotation output switching unit 111b switches the setting of the output form of the rotation signal PG, the setting holding unit 1111b holds the setting of the output form after the switching. Then, the rotation signal output section 115 converts the rotation position signal RP into the rotation signal PG so that the rotation signal PG has the output form held by the setting holding section 1111 b. On the other hand, when the supply of the power supply voltage Vcc to the motor control unit 11 is stopped or the speed command signal Vsp to the motor control unit 11 is stopped, the setting holding unit 1111 resets the setting of the output form of the rotation signal PG.
Here, in modification 1, the rotation signal PG is a pulse wave. The output form of the rotation signal PG is represented by the number of pulses included in the rotation signal PG every 1 rotation of the motor M. Therefore, the rotation output switching unit 111b changes the number of pulses included in the rotation signal PG every 1 rotation of the motor M. In modification 1, the 1 st power supply line FL to which the power supply voltage Vcc is input and the 2 nd power supply line SL to which the speed command signal Vsp is input are substituted for the power supply lines for changing the number of pulses included in the rotation signal PG for every 1 rotation of the motor M, whereby an increase in the number of power supply lines can be suppressed.
With reference to fig. 6, the setting switching unit 111 of the motor control unit 11 will be described. The setting switch 111 further includes a rotation direction switch 111 a. The rotation direction switching unit 111a switches the setting of the rotation direction of the motor M. The rotation direction switching unit 111a is connected to the control signal line CL. The rotation direction switching unit 111a switches the setting of the rotation direction of the motor M in response to a control signal CS output from the power storage unit 15a of the two power storage units 15 to the control signal line CL.
Specifically, the setting of the rotation direction of the motor M is switched to the 1 st rotation direction as described below.
That is, when the control signal CS having a voltage value lower than the 1 st threshold TH1 is input to the rotation direction switching unit 111a in a state where the power supply voltage Vcc is input to the motor control unit 11, the rotation direction switching unit 111a switches the setting of the rotation direction of the motor M to the 1 st rotation direction. Therefore, according to the modification 1, the 1 st power supply line FL to which the power supply voltage Vcc is input and the 2 nd power supply line SL to which the speed command signal Vsp is input are used instead of the power supply line for switching the setting of the rotation direction of the motor M to the 1 st rotation direction. As a result, the motor device B1 and the motor control device 1 can suppress an increase in the number of energization wires for switching the setting of the rotation direction of the motor M.
More specifically, the rotation direction switching unit 111a switches the setting of the rotation direction of the motor M to the 1 st rotation direction in the same procedure as the setting switching unit 111 described with reference to fig. 2 switches the setting of the motor control unit 11 to the 1 st setting. Therefore, in modification 1, the rotation direction switching unit 111a is referred to as "rotation direction switching unit 111 a" instead, and the power storage unit 15 is referred to as "power storage unit 15 a" instead, in the description of fig. 2 in embodiment 1. Note that the "setting holding unit 1111" is referred to as "setting holding unit 1111 a" instead, the "setting for the motor control unit 11" is referred to as "setting of the rotational direction of the motor M" instead, and the "1 st setting" is referred to as "1 st rotational direction" instead.
On the other hand, as described below, the setting of the rotation direction of the motor M is switched to the 2 nd rotation direction.
That is, when the control signal CS having a voltage value equal to or greater than the 1 st threshold TH1 is input to the rotation direction switching unit 111a in a state where the power supply voltage Vcc is input to the motor control unit 11, the rotation direction switching unit 111a switches the setting of the rotation direction of the motor M to the 2 nd rotation direction. Therefore, according to the modification 1, the 1 st power supply line FL to which the power supply voltage Vcc is input and the 2 nd power supply line SL to which the speed command signal Vsp is input are used instead of the power supply line for switching the setting of the rotation direction of the motor M to the 2 nd rotation direction. As a result, the motor device B1 and the motor control device 1 can further suppress an increase in the number of energization wires for switching the setting of the rotation direction of the motor M.
Specifically, the rotation direction switching unit 111a switches the setting of the rotation direction of the motor M to the 2 nd rotation direction in the same procedure as that in the case where the setting switching unit 111 described with reference to fig. 3 and 5 switches the setting of the motor control unit 11 to the 2 nd setting.
Therefore, according to the 1 st modification, the control signal CS is input to the rotation direction switching unit 111a in a state where the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input to the rotation control unit 113. As a result, the rotation direction switching unit 111a switches the setting of the rotation direction of the motor M to the 2 nd rotation direction in a state where the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input to the rotation control unit 113. Thus, during the rotation of the motor M, it is possible to suppress the switching of the rotation direction of the motor M by the speed command signal Vsp having a voltage value equal to or greater than the 1 st threshold TH 1.
In modification 1, the rotation direction switching unit 111a is referred to as "rotation direction switching unit 111 a" and the power storage unit 15 is referred to as "power storage unit 15 a" instead in the description of fig. 3 and 5 in embodiment 1. Note that the "setting holding unit 1111" is referred to as "setting holding unit 1111 a" instead, the "setting for the motor control unit 11" is referred to as "setting of the rotational direction of the motor M" instead, and the "2 nd setting" is referred to as "2 nd rotational direction" instead.
The rotation direction switching unit 111a includes a setting holding unit 1111 a. The setting holding unit 1111a holds the setting of the rotation direction of the motor M. Specifically, when the rotation direction switching unit 111a switches the setting of the rotation direction of the motor M, the setting holding unit 1111a holds the setting of the rotation direction after the switching. The rotation control unit 113 controls the motor M via the inverter 13 so that the motor M rotates in the rotation direction held by the setting holding unit 1111 a. On the other hand, when the supply of the power supply voltage Vcc to the motor control unit 11 is stopped or the speed command signal Vsp to the motor control unit 11 is stopped, the setting holding unit 1111b resets the setting of the rotation direction of the motor M.
(modification 2)
A modification 2 of embodiment 1 of the present invention will be described with reference to fig. 7. The motor system a1 of modification 2 differs from modification 1 mainly in that the rotation direction switching unit 111a and the rotation output switching unit 111b share one power storage unit 15 in modification 2. Hereinafter, differences between the 2 nd modification and the 1 st modification will be mainly described.
Fig. 7 is a diagram showing a motor system a1 of modification 2. As shown in fig. 7, the motor control device 1 of modification 2 includes one power storage unit 15. Power storage unit 15 is connected to 2 nd power supply line SL. Then, the 2 nd energization line SL inputs the speed command signal Vsp to the power storage unit 15. As a result, power storage unit 15 receives speed command signal Vsp and stores the speed command signal Vsp. The power storage unit 15 is connected to a control signal line CL. The power storage unit 15 is connected to both the rotation direction switching unit 111a and the rotation output switching unit 111b via a control signal line CL. That is, the power storage unit 15 is shared by the rotation output switching unit 111b and the rotation direction switching unit 111 a.
Therefore, according to modification 2, the motor control device 1 can be simplified as compared with the case where the power storage unit 15 is provided for each of the rotation direction switching unit 111a and the rotation output switching unit 111 b. As a result, the manufacturing cost of the motor control device 1 can be reduced. In modification 2, one power storage unit 15 functions as the power storage unit 15a and the power storage unit 15b of modification 1 described with reference to fig. 6.
(embodiment mode 2)
Embodiment 2 of the present invention will be described with reference to fig. 8 to 11. Embodiment 2 differs from embodiment 1 mainly in that the motor control unit 11 of the motor system a1 of embodiment 2 includes a power supply input switching unit 117 that switches between input and interruption of the power supply voltage Vcc. Hereinafter, differences between embodiment 2 and embodiment 1 will be mainly described.
Fig. 8 is a diagram showing a motor system a1 of embodiment 2. As shown in fig. 8, in the motor system a1 of embodiment 2, the motor control unit 11 of the motor control device 1 includes the power input switching unit 117 and the internal power supply line IL in addition to the configuration of the motor control unit 11 described with reference to fig. 1. The power input switching unit 117 is connected to the 1 st power line FL, the 2 nd power line SL, and the internal power line IL. The power input switching unit 117 is, for example, a power input switching circuit. The power input switching unit 117 switches between input and interruption of the power supply voltage Vcc to the inside of the motor control unit 11 according to the 2 nd threshold TH 2. The 2 nd threshold TH2 is less than the 1 st threshold TH 1. The 1 st threshold TH1 is, for example, 2V, and the 2 nd threshold TH2 is, for example, 1V. The power input switching unit 117 outputs the power supply voltage Vcc to the internal power supply line IL, and inputs the power supply voltage Vcc to the inside of the motor control unit 11. Further, the speed command signal Vsp is input to the power input switching unit 117 from the 2 nd power supply line SL.
Specifically, when the voltage value of the speed command signal Vsp is greater than the 2 nd threshold TH2 in a state where the power supply voltage Vcc is input to the power supply input switching unit 117 from the 1 st power supply line FL, the power supply input switching unit 117 inputs the power supply voltage Vcc to the inside of the motor control unit 11 via the internal power supply line IL. Therefore, in a state where the power supply voltage Vcc is not input from the 1 st power supply line FL to the power supply input switching unit 117, the power supply voltage Vcc is not input to the inside of the motor control unit 11.
On the other hand, when the voltage value of the speed command signal Vsp is equal to or less than the 2 nd threshold TH2 in a state where the power supply voltage Vcc is input to the power supply input switching unit 117 from the 1 st power supply line FL, the power supply input switching unit 117 blocks the input of the power supply voltage Vcc to the inside of the motor control unit 11.
Next, control when the setting of the motor control unit 11 is switched to the 1 st setting will be described with reference to fig. 8 and 9. Fig. 9 is a timing chart showing the power supply voltage Vcc, the speed command signal Vsp, and the control signal CS when the setting of the motor control unit 11 is switched to the 1 st setting. In fig. 9, the vertical axis shows the potential of the 1 st current supply line FL, the potential of the internal power supply line IL, the potential of the 2 nd current supply line SL, and the potential of the control signal line CL. In addition, the horizontal axis represents time. In the description of fig. 9, the same operations and states as those in fig. 2 will be appropriately omitted.
As shown in fig. 8 and 9, at time t1, power supply voltage Vcc is input to power supply input switching unit 117 from power supply line 1 FL. At time t1, speed command signal Vsp is not input to power-on line 2 SL, and therefore power input switching unit 117 does not output power supply voltage Vcc to internal power supply line IL.
At a time t2 after the time t1, the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 and higher than the 2 nd threshold TH2 is input from the 2 nd power-on line SL to the power input switching unit 117. Therefore, the power supply input switching unit 117 outputs the power supply voltage Vcc to the internal power supply line IL, and inputs the power supply voltage Vcc to the inside of the motor control unit 11. The power storage unit 15 also inputs a control signal CS having a voltage value lower than the 1 st threshold TH1 and higher than the 2 nd threshold TH2 to the setting switching unit 111 via a control signal line CL. As a result, the setting switching unit 111 switches the setting of the motor control unit 11 to the 1 st setting.
That is, when the control signal CS having a voltage value lower than the 1 st threshold TH1 and higher than the 2 nd threshold TH2 is input to the setting switching unit 111 in a state where the power supply voltage Vcc is input from the internal power supply line IL to the inside of the motor control unit 11, the setting switching unit 111 switches the setting of the motor control unit 11 to the 1 st setting. As a result, the setting of the motor control unit 11 is determined, and the setting holding unit 1111 holds the 1 st setting.
As described above with reference to fig. 8 and 9, in embodiment 2, the setting of the motor control unit 11 can be switched to the 1 st setting in accordance with the state changes of the power supply voltage Vcc and the speed command signal Vsp. That is, in embodiment 2, the 1 st current carrying wire FL and the 2 nd current carrying wire SL are used in place of the current carrying wire for switching the setting of the motor control unit 11 to the 1 st setting, as in embodiment 1. Therefore, the motor device B1 and the motor control device 1 can suppress an increase in the number of energization wires for switching the setting of the motor control unit 11.
Next, control when the setting of the motor control unit 11 is switched to the 2 nd setting will be described with reference to fig. 8 and 10. Fig. 10 is a timing chart showing the power supply voltage Vcc, the speed command signal Vsp, and the control signal CS when the setting of the motor control unit 11 is switched to the 2 nd setting. In fig. 10, the vertical axis shows the potential of the 1 st current carrying line FL, the potential of the internal power supply line IL, the potential of the 2 nd current carrying line SL, and the potential of the control signal line CL. In addition, the horizontal axis represents time. In the description of fig. 10, the same operations and states as those in fig. 3 will be appropriately omitted.
As shown in fig. 8 and 10, at time t3, the speed command signal Vsp equal to or greater than the 1 st threshold TH1 is input to the motor control unit 11 from the 2 nd power supply line SL. Therefore, the power storage unit 15 outputs the control signal CS having a voltage value equal to or higher than the 1 st threshold TH1 to the setting switching unit 111 via the control signal line CL. At time t3, power supply voltage Vcc is not input to the 1 st power line FL. Therefore, the power supply voltage Vcc is not input to the inside of the motor control unit 11.
At a time t4 after the time t3, the voltage value of the speed command signal Vsp of the 2 nd energization line SL decreases to be lower than the 1 st threshold TH 1. The voltage value of the reduced speed command signal Vsp is greater than the 2 nd threshold TH 2. Time t4 represents when the voltage value of speed command signal Vsp starts to decrease.
On the other hand, from time t3 to time t4, power storage unit 15 stores power. Therefore, at time t4, when the voltage value of the speed command signal Vsp decreases to be lower than the 1 st threshold TH1, the power storage unit 15 starts discharging to the control signal line CL from time t 4. As a result, power storage unit 15 outputs control signal CS having a decreased voltage value to control signal line CL from time t 4. In this case, the power storage unit 15 continues for a predetermined time P or more from time t4 and outputs the control signal CS having a voltage value of 1 st threshold TH1 or more to the control signal line CL.
At time t5, power supply voltage Vcc is input to power supply input switching unit 117 from power-supply-1 line FL. At time t5, speed command signal Vsp having a voltage value greater than 2 nd threshold TH2 is input from power supply input switching unit 117 through 2 nd power supply line SL. Therefore, the power supply input switching unit 117 outputs the power supply voltage Vcc to the internal power supply line IL, and inputs the power supply voltage Vcc to the inside of the motor control unit 11.
As a result, at time t5, the voltage value of the control signal CS output to the control signal line CL is equal to or greater than the 1 st threshold TH1 in a state where the power supply voltage Vcc is input to the motor control unit 11. Therefore, the setting switching unit 111 switches the setting of the motor control unit 11 to the 2 nd setting. Then, at time t5, the setting for the motor control unit 11 is determined, and the setting holding unit 1111 holds the 2 nd setting.
As described above with reference to fig. 8 and 10, in embodiment 2, the setting of the motor control unit 11 can be switched to the 2 nd setting in accordance with a state change of the power supply voltage Vcc and the speed command signal Vsp such as "a state in which the power supply voltage Vcc is not input to the inside of the motor control unit 11 → a state in which the speed command signal Vsp of the 1 st threshold TH1 or more is input → a state in which the speed command signal Vsp is lowered to be lower than the 1 st threshold TH1 → a state in which the power supply voltage Vcc is input to the inside of the motor control unit 11".
Specifically, in embodiment 2, in a state where the power supply voltage Vcc is not input from the 1 st power supply line FL to the power supply input switching unit 117, after the speed command signal Vsp having the voltage value equal to or greater than the 1 st threshold TH1 is input to the motor control unit 11, if the voltage value of the speed command signal Vsp decreases to be lower than the 1 st threshold TH1, the power storage unit 15 continues for a certain time period P or more via the control signal line CL and outputs the control signal CS having the voltage value equal to or greater than the 1 st threshold TH1 to the setting switching unit 111.
Then, when the power supply voltage Vcc is input to the power supply input switching unit 117 from the 1 st power supply line FL and the voltage value of the speed command signal Vsp is larger than the 2 nd threshold TH2, the power supply input switching unit 117 inputs the power supply voltage Vcc to the inside of the motor control unit 11 via the internal power supply line IL.
Further, when the control signal CS having a voltage value equal to or greater than the 1 st threshold TH1 is input to the setting switching unit 111 in a state where the power supply voltage Vcc is input from the internal power supply line IL to the inside of the motor control unit 11, the setting switching unit 111 switches the setting of the motor control unit 11 to the 2 nd setting.
Therefore, in embodiment 2, when the motor control device 1 includes the power input switching unit 117 that operates in accordance with the speed command signal Vsp, the setting of the motor control unit 11 can be easily switched by controlling the voltage value of the speed command signal Vsp based on two different thresholds (the 1 st threshold TH1 and the 2 nd threshold TH2) and controlling the input timing of the speed command signal Vsp at different voltage values.
In embodiment 2, similarly to embodiment 1, the 1 st current carrying wire FL and the 2 nd current carrying wire SL are used in place of the current carrying wire for switching the setting of the motor control unit 11 to the 2 nd setting. Therefore, the motor device B1 and the motor control device 1 can further suppress an increase in the number of current carrying wires for switching the setting of the motor control unit 11. In embodiment 2, the same effects as those in embodiment 1 are obtained.
In embodiment 2, the motor control device 1 controls the power supply voltage Vcc at the time of switching the setting to the motor control unit 11 by controlling the power supply input switching unit 117 based on the speed command signal Vsp. Therefore, the configuration of the controller B2 can be simplified as compared with the case where the controller B2 is used alone to control the power supply voltage Vcc at the time of switching the setting to the motor control unit 11.
Next, the operation of the motor system a1 when the setting of the motor control unit 11 is switched to the 2 nd setting will be described with reference to fig. 8 and 11. Fig. 11 is a flowchart showing the operation of the motor control device 1. As shown in fig. 11, the motor system a1 executes each process of step S1 to step S18.
As shown in fig. 8 and 11, in step S11, the power supply unit 3 inputs the speed command signal Vsp having a voltage value equal to or greater than the 1 st threshold TH1 from the 2 nd power supply line SL to the motor control unit 11 in a state where the power supply voltage Vcc is not input from the 1 st power supply line FL to the power supply input switching unit 117.
In step S12, the power supply unit 3 decreases the voltage value of the speed command signal Vsp input to the motor control unit 11 to be lower than the 1 st threshold TH 1.
In step S13, power storage unit 15 outputs control signal CS having a voltage value equal to or higher than 1 st threshold TH1 to setting switching unit 111 for a fixed time period P or longer.
In step S14, in a case where the power supply voltage Vcc is not input to the power supply input switching portion 117, or the speed command signal Vsp of a voltage value greater than the 2 nd threshold TH2 is not input to the power supply input switching portion 117, the power supply input switching portion 117 waits for the power supply voltage Vcc to be input, and waits for the speed command signal Vsp of a voltage value greater than the 2 nd threshold TH2 to be input.
On the other hand, in step S14, in the case where the power supply voltage Vcc is input to the power supply input switching section 117, and the speed command signal Vsp of a voltage value larger than the 2 nd threshold TH2 is input to the power supply input switching section 117, the process advances to step S15.
In step S15, the power input switching unit 117 inputs the power supply voltage Vcc to the inside of the motor control unit 11.
In step S16, the setting switch 111 determines whether or not the control signal CS having a voltage value equal to or greater than the 1 st threshold TH1 has been input.
If the determination at step S16 is negative, the process proceeds to step S11.
On the other hand, if the determination in step S16 is positive, the process proceeds to step S17. "determination affirmative" indicates that the control signal CS determined to have a voltage value of the 1 st threshold TH1 or more has been input.
In step S17, the setting switching unit 111 switches the setting for the motor control unit 11 to the 2 nd setting.
In step S18, the rotation control unit 113 controls the rotation speed of the motor M in accordance with the speed command signal Vsp.
As described above with reference to fig. 11, according to embodiment 2, the setting of the motor control unit 11 can be switched to the 2 nd setting by controlling the input timing of the power supply voltage Vcc and the speed command signal Vsp. Therefore, in the motor system a1, the number of current carrying wires for switching the setting of the motor control unit 11 can be suppressed from increasing.
In the 1 st modification and the 2 nd modification of embodiment 1 described with reference to fig. 6 and 7, the motor control unit 11 may further include the power input switching unit 117 of embodiment 2.
For example, in modification 1, when the motor control unit 11 includes the power input switching unit 117, the description of embodiment 2 will be referred to as follows.
That is, in the description of fig. 9 to 11 in embodiment 2, the rotation output switching unit 111b is referred to as "rotation output switching unit 111 b" instead, and the power storage unit 15 is referred to as "power storage unit 15 b" instead. The "setting holding unit 1111" is referred to as a "setting holding unit 1111 b" instead, and the "setting of the motor control unit 11" is referred to as a "setting of the output form of the rotation signal PG" instead.
The rotation output switching unit 111b is configured to change the "1 st setting" to the "1 st output format" in the description of fig. 9 in embodiment 2, and to change the "2 nd setting" to the "2 nd output format" in the descriptions of fig. 10 and 11 in embodiment 2.
On the other hand, in the explanation of fig. 9 to 11 in embodiment 2, the rotation direction switching unit 111a is referred to as "rotation direction switching unit 111 a" instead, and the power storage unit 15 is referred to as "power storage unit 15 a" instead. The "setting holding unit 1111" is referred to as a "setting holding unit 1111 a" instead, and the "setting of the motor control unit 11" is referred to as a "setting of the rotation direction of the motor M" instead.
The rotation direction switching unit 111a is configured to change the "1 st setting" to the "1 st rotation direction" in the description of fig. 9 in embodiment 2, and to change the "2 nd setting" to the "2 nd rotation direction" in the descriptions of fig. 10 and 11 in embodiment 2.
For example, in modification 2, when the motor control unit 11 includes the power input switching unit 117, one power storage unit 15 functions as the power storage unit 15a and the power storage unit 15b in the case where the motor control unit 11 includes the power input switching unit 117 in modification 1.
Here, in embodiment 1, modification 2, and embodiment 2, the motor control unit 11 may be formed of, for example, one IC, and the motor control unit 11 and the inverter 13 may be formed of, for example, one IC. In embodiment 1, modification 2, and embodiment 2, power storage unit 15 is disposed outside motor control unit 11. However, power storage unit 15 may be disposed inside motor control unit 11, and the disposition of power storage unit 15 is not particularly limited.
The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and can be implemented in various forms without departing from the spirit thereof. The plurality of constituent elements disclosed in the above embodiments may be changed as appropriate. For example, any one of all the components described in one embodiment may be added to the components of another embodiment, or some of all the components described in one embodiment may be deleted from the embodiments.
The drawings are schematically illustrated mainly for the purpose of facilitating understanding of the invention, and the thickness, length, number, interval, and the like of each illustrated component may be different from those of the actual components for convenience of drawing. The configuration of each component shown in the above-described embodiment is an example, and is not particularly limited, and it goes without saying that various modifications are possible within a range that does not substantially depart from the effects of the present invention.
Industrial applicability
The invention provides a motor control device and a motor device, which have industrial applicability.

Claims (9)

1. A motor control device includes:
a motor control unit for controlling the motor;
a1 st power line for inputting a power supply voltage to the motor control unit;
a 2 nd power supply line for inputting a speed command signal for controlling a rotation speed of the motor to the motor control unit; and
a power storage unit connected to the 2 nd power line and configured to store power upon receiving the speed command signal,
the motor control unit includes:
a rotation control unit that controls a rotation speed of the motor in accordance with the speed command signal when the speed command signal is input in a state where the power supply voltage is input to the motor control unit; and
a setting switching unit that switches the setting of the motor control unit,
wherein after the speed command signal having a voltage value equal to or higher than a1 st threshold value is input to the motor control unit in a state where the power supply voltage is not input to the motor control unit, the power storage unit continues for a certain time or longer and outputs a control signal having a voltage value equal to or higher than the 1 st threshold value to the setting switching unit when the voltage value of the speed command signal decreases to be lower than the 1 st threshold value,
the power supply voltage is input to the motor control unit after the voltage value of the speed command signal decreases to be lower than the 1 st threshold value,
the setting switching unit switches the setting of the motor control unit when the control signal having the voltage value equal to or greater than the 1 st threshold value is input in a state where the power supply voltage is input to the motor control unit.
2. The motor control apparatus according to claim 1,
the setting switching section resets the setting of the motor control section when the input of the power supply voltage to the motor control section is stopped,
after the setting of the motor control unit is reset, the speed command signal having the voltage value equal to or greater than the 1 st threshold value is input to the motor control unit in a state where the power supply voltage is not input to the motor control unit, and when the voltage value of the speed command signal is decreased to be lower than the 1 st threshold value, the power storage unit continues for the predetermined time or more and outputs the control signal having the voltage value equal to or greater than the 1 st threshold value to the setting switching unit.
3. The motor control device according to claim 1 or 2,
the setting of the motor control section indicates a setting of a rotation direction of the motor,
the setting switching part has a rotation direction switching part for switching the setting of the rotation direction of the motor,
the rotation direction switching unit switches the setting of the rotation direction of the motor when the control signal having the voltage value equal to or greater than the 1 st threshold value is input in a state where the power supply voltage is input to the motor control unit.
4. The motor control apparatus according to any one of claims 1 to 3,
the motor control device further includes a rotational position detecting unit that detects a rotational position of a rotor of the motor,
the motor control unit further includes a rotation signal output unit that converts a rotation position signal indicating the rotation position detected by the rotation position detecting unit into a rotation signal indicating a rotation speed of the motor and outputs the rotation signal,
the setting of the motor control section represents a setting of an output form of the rotation signal,
the setting switching unit has a rotation output switching unit that switches the setting of the output form of the rotation signal,
the rotation output switching unit switches the setting of the output form of the rotation signal when the control signal having the voltage value equal to or greater than the 1 st threshold value is input in a state where the power supply voltage is input to the motor control unit.
5. The motor control apparatus according to claim 4,
the rotation signal is a pulse wave which is,
the output form of the rotation signal is represented by the number of pulses contained in the rotation signal per 1 rotation of the motor.
6. The motor control device according to claim 1 or 2,
the motor control device further includes a rotational position detecting unit that detects a rotational position of a rotor of the motor,
the motor control unit further includes a rotation signal output unit that converts a rotation position signal indicating the rotation position detected by the rotation position detecting unit into a rotation signal indicating a rotation speed of the motor and outputs the rotation signal,
the setting of the motor control section indicates setting of an output form of the rotation signal and setting of a rotation direction of the motor,
the setting switching unit includes:
a rotation output switching unit that switches the setting of the output format of the rotation signal; and
a rotation direction switching unit that switches setting of a rotation direction of the motor,
the rotation output switching unit switches the setting of the output form of the rotation signal when the control signal having the voltage value equal to or greater than the 1 st threshold value is input in a state where the power supply voltage is input to the motor control unit,
the rotation direction switching unit switches setting of a rotation direction of the motor when the control signal having the voltage value equal to or greater than the 1 st threshold value is input in a state where the power supply voltage is input to the motor control unit,
the power storage unit is shared by the rotation output switching unit and the rotation direction switching unit.
7. The motor control apparatus according to any one of claims 1 to 6,
the motor control unit further includes a power input switching unit that switches between input and interruption of the power supply voltage to the inside of the motor control unit according to a 2 nd threshold value that is smaller than the 1 st threshold value,
the power input switching unit inputs the power voltage to the inside of the motor control unit when the voltage value of the speed command signal is greater than the 2 nd threshold value in a state where the power voltage is input to the power input switching unit,
the power input switching unit cuts off the input of the power voltage to the inside of the motor control unit when the voltage value of the speed command signal is equal to or less than the 2 nd threshold value in a state where the power voltage is input to the power input switching unit,
not inputting the power supply voltage to the inside of the motor control section in a state where the power supply voltage is not input to the power supply input switching section,
wherein the power storage unit continues for the predetermined time or longer and outputs the control signal having the voltage value of the 1 st threshold or more to the setting switching unit when the voltage value of the speed command signal decreases to be lower than the 1 st threshold after the speed command signal having the voltage value of the 1 st threshold or more is input to the motor control unit in a state where the power supply voltage is not input to the power supply input switching unit,
the power input switching unit inputs the power voltage to the inside of the motor control unit when the power voltage is input to the power input switching unit and the voltage value of the speed command signal is greater than the 2 nd threshold value,
the setting switching unit switches the setting of the motor control unit when the control signal having the voltage value equal to or greater than the 1 st threshold value is input in a state where the power supply voltage is input to the inside of the motor control unit.
8. The motor control apparatus according to any one of claims 1 to 7,
the power storage unit includes a diode and a capacitor.
9. A motor device includes:
the motor control device according to any one of claims 1 to 8; and
the motor.
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