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EP-4738684-A1 - DRIVE DEVICE FOR DRIVING MOTOR AND OPERATING METHOD THEREOF

EP4738684A1EP 4738684 A1EP4738684 A1EP 4738684A1EP-4738684-A1

Abstract

Provided are a drive device (100, 200, 300) for driving a motor and an operating method for the drive device (100, 200, 300). The drive device (100, 200, 300) includes a battery module (110), a conversion circuit (120), an energy storage circuit (130, 230, 330), and a control switch (140). The conversion circuit (120) is coupled to the motor, and the battery module (110). The control switch (140) is coupled in series with the energy storage circuit (130, 230, 330) between a first power terminal (T1) and a second power terminal (T2) of the battery module (110). When a voltage value (V1) at the first power terminal (T1) is higher than a first setting voltage value (VS1), the drive device (100) turns on the control switch (140) to enable the energy storage circuit (130, 230, 330) to store electrical energy at the first power terminal (T1).

Inventors

  • CHEN, JYH-WEI
  • SU, HSIU-HSIEN
  • TZENG, YUN-CHI

Assignees

  • APh ePower Co., Ltd.

Dates

Publication Date
20260506
Application Date
20250620

Claims (15)

  1. A drive device (100, 200, 300) for driving a motor, comprising: a battery module (110); a conversion circuit (120) coupled to the motor, a first power terminal (T1) of the battery module (110), and a second power terminal (T2) of the battery module (110); an energy storage circuit (130, 230, 330); and a control switch (140) coupled in series with the energy storage circuit (130, 230, 330) between the first power terminal (T1) and the second power terminal (T2), wherein in response to the voltage value (V1) at the first power terminal (T1) being higher than a first setting voltage value (VS1), the drive device (100, 200, 300) turns on the control switch (140) to enable the energy storage circuit (130, 230, 330) to store electrical energy at the first power terminal (T1).
  2. The drive device (200, 300) as claimed in claim 1, wherein the energy storage circuit (230, 330) comprises: a first switch (SW1), wherein a first terminal of the first switch (SW1) is coupled to the first power terminal (T1); and an energy storage battery (231, 331) coupled between a second terminal of the first switch (SW1) and the control switch (140).
  3. The drive device (200, 300) as claimed in claim 2, wherein in response to the voltage value (V1) at the first power terminal (T1) being higher than the first setting voltage value (VS1), the drive device (100, 200, 300) turns on the control switch (140) and the first switch (SW1).
  4. The drive device (300) as claimed in claim 2, wherein the energy storage circuit (330) further comprising: a second switch (SW2), wherein a first terminal of the second switch (SW2) is coupled to the first power terminal (T1); and a resistor (332) coupled between a second terminal of the second switch (SW2) and the control switch (140).
  5. The drive device (300) as claimed in claim 4, wherein in response to the voltage value (V1) at the first power terminal (T1) being higher than a second setting voltage value (VS2), the drive device (100, 200, 300) turns on the control switch (140), the first switch (SW1), and the second switch (SW2), and the second setting voltage value (VS1) is higher than the first setting voltage value (VS1).
  6. The drive device (300) as claimed in claim 5, wherein in response to the voltage value (V1) at the first power terminal (T1) being higher than the second setting voltage value (VS2) and a current value of a charging current (IB) flowing through the energy storage battery (331) being higher than a setting current value (IS), the drive device (100, 200, 300) turns on the control switch (140), the first switch (SW1), and the second switch (SW2).
  7. The drive device (100, 200, 300) as claimed in claim 5, wherein during a period when the control switch (140), the first switch (SW1), and the second switch (SW2) are turned on, in response to a time duration that a current value of a charging current (IB) flowing through the energy storage battery (331) is higher than a setting current value (IS) being greater than a setting time duration, the drive device (100, 200, 300) turns on the control switch (140) and the second switch (SW2), and turns off the first switch (SW1).
  8. The drive device (100, 200, 300) as claimed in claim 5, wherein during a period when the control switch (140), the first switch (SW1), and the second switch (SW2) are turned on, in response to the voltage value (V1) at the first power terminal (T1) being higher than a third setting voltage value (VS3), the drive device (100, 200, 300) turns on the control switch (140) and the second switch (SW2), and turns off the first switch (SW1), and the third setting voltage value (VS3) is higher than the second setting voltage value (VS2).
  9. An operating method (S100) for a drive device (100, 200, 300), wherein the drive device (100, 200, 300) is for driving a motor, the drive device (100, 200, 300) comprises a battery module (110), a conversion circuit (120), an energy storage circuit (130, 230, 330), and a control switch (140), the conversion circuit (120) is coupled to the motor, a first power terminal (T1) of the battery module (110), and a second power terminal (T2) of the battery module (110), the control switch (140) is coupled in series with the energy storage circuit (130, 230, 330) between the first power terminal (T1) and the second power terminal (T2), and the operating method (S100) comprises: receiving a voltage value (V1) at the first power terminal (T1); and in response to the voltage value (V1) at the first power terminal (T1) being higher than a first setting voltage value (VS1), turning on the control switch (140) to enable the energy storage circuit (130, 230, 330) to store electrical energy at the first power terminal (T1).
  10. The operating method (S100) as claimed in claim 9, wherein the energy storage circuit (130, 230, 330) comprises: a first switch (SW1), wherein a first terminal of the first switch (SW1) is coupled to the first power terminal (T1); and an energy storage battery (231, 331) coupled between a second terminal of the first switch (SW1) and the control switch (140).
  11. The operating method (S100) as claimed in claim 10, further comprising: in response to the voltage value (V1) at the first power terminal (T1) being higher than the first setting voltage value (VS1), turning on the control switch (140) and the first switch (SW1).
  12. The operating method (S100) as claimed in claim 10, wherein the energy storage circuit (130, 230, 330) further comprises: a second switch (SW2), wherein a first terminal of the second switch (SW2) is coupled to the first power terminal (T1); and a resistor (332) coupled between a second terminal of the second switch (SW2) and the control switch (140).
  13. The operating method (S100) as claimed in claim 12, further comprising: in response to the voltage value (V1) at the first power terminal (T1) being higher than a second setting voltage value (VS2), turning on the control switch (140), the first switch (SW1), and the second switch (SW2), wherein the second setting voltage value (VS2) is higher than the first setting voltage value (VS1).
  14. The operating method (S100) as claimed in claim 13, further comprising: in response to the voltage value (VS1) at the first power terminal (T1) being higher than the second setting voltage value (VS2) and a current value of a charging current (IB) flowing through the energy storage battery (331) being higher than a setting current value (IS), turning on the control switch (140), the first switch (SW1), and the second switch (SW2).
  15. The operating method (S100) as claimed in claim 13, further comprising: during a period when the control switch (140), the first switch (SW1), and the second switch (SW2) are turned on, in response to a time duration that a current value of a charging current (IB) flowing through the energy storage battery (331) is higher than a setting current value (IS) being greater than a setting time duration, turning on the control switch (140) and the second switch (SW2), and turning off the first switch (SW1).

Description

BACKGROUND Technical Field The disclosure relates to a drive device and an operating method for the drive device, and particularly relates to a drive device for driving a motor and an operating method for the drive device. Related Art The drive device includes a battery module and a conversion circuit. The conversion circuit may provide electrical energy stored in the battery module to the motor. The motor is driven according to the electrical energy. When the motor decelerates or brakes, the motor provides a back electromotive force. The conversion circuit recovers the electrical energy of the back electromotive force to the battery module. It should be noted that when the electrical energy of the back electromotive force is too large, the battery module may not be able to withstand the voltage value of the back electromotive force and may be damaged. Similarly, the power switch of the conversion circuit may not be able to withstand the voltage value of the back electromotive force and may be damaged. Therefore, when the motor decelerates or brakes, how to protect the drive device to extend the service life of the drive device is one of the research focuses of persons skilled in the art. SUMMARY The disclosure provides a drive device for driving a motor and an operating method for the drive device, which can reduce the risk of damage to the drive device from the electrical energy from the motor. In an embodiment of the disclosure, the drive device of the disclosure is for driving a motor. The drive device includes a battery module, a conversion circuit, an energy storage circuit, and a control switch. The conversion circuit is coupled to the motor, a first power terminal of the battery module, and a second power terminal of the battery module. The control switch is coupled in series with the energy storage circuit between the first power terminal and the second power terminal. When a voltage value at the first power terminal is higher than a first setting voltage value, the drive device turns on the control switch to enable the energy storage circuit to store electrical energy at the first power terminal. In an embodiment of the disclosure, the operating method is for a drive device. The drive device is for driving a motor. The drive device includes a battery module, a conversion circuit, an energy storage circuit, and a control switch. The conversion circuit is coupled to the motor, a first power terminal of the battery module, and a second power terminal of the battery module. The control switch is coupled in series with the energy storage circuit between the first power terminal and the second power terminal. The operating method includes the following. A voltage value is received at the first power terminal. Also, when the voltage value at the first power terminal is higher than a first setting voltage value, the control switch is turned on to enable the energy storage circuit to store electrical energy at the first power terminal. Based on the above, when the voltage value at the first power terminal is higher than a first setting voltage value, the drive device turns on the control switch to enable the energy storage circuit to store the electrical energy at the first power terminal. Therefore, when the voltage value at the first power terminal is too high, the energy storage circuit stores the electrical energy at the first power terminal to reduce the risk of damage to the drive device from the electrical energy at the first power terminal. In this way, the service life of the drive device can be extended. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a drive device according to an embodiment of the disclosure.FIG. 2 is a schematic diagram of a drive device according to an embodiment of the disclosure.FIG. 3 is a schematic diagram of a drive device according to an embodiment of the disclosure.FIG. 4 is a flowchart of an operating method according to an embodiment of the disclosure. DESCRIPTION OF THE EMBODIMENTS Some embodiments of the disclosure will be described in detail with reference to the accompanying drawings. In the following description, when the same reference numerals appear in different drawings, the reference numerals will be regarded as the same or similar elements. These embodiments are merely a part of the disclosure and do not disclose all possible implementations of the disclosure. More precisely, these embodiments are merely examples within the scope of the appended claims of the disclosure. Please refer to FIG. 1, which is a schematic diagram of a drive device according to an embodiment of the disclosure. In this embodiment, a drive device 100 is for driving a motor MTR. The drive device 100 includes a battery module 110, a conversion circuit 120, an energy storage circuit 130, and a control switch 140. The conversion circuit 120 is coupled to the motor MTR, a first power terminal T1 of the battery module 110, and a second power terminal T2 of the battery m