Energy storage motor control circuit
By using a series circuit of CPU control components and IGBT devices, a small-sized, intelligent motor control system is achieved, compatible with both DC and AC motors. This solves the problem of relay contact arcing and improves the reliability and lifespan of motor control.
Patent Information
- Application Number
- CN202423006624.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-06
AI Technical Summary
In the current energy storage motor control schemes in substations, AC contactors are expensive and bulky, making it difficult to achieve intelligent control in a small size. Furthermore, when interrupting large currents, the relay contacts are prone to arcing, affecting their lifespan.
The energy storage motor control circuit, composed of CPU control components, onboard relays and IGBT devices, is compatible with DC and single-phase AC motors. It realizes the rotation and stop control of the motor through the series connection of relays and electronic switches, and has current detection function.
It achieves compact motor control, is compatible with different types of motors, improves relay contact life, has current monitoring function, solves arcing problem, and provides intelligent control solution.
Smart Images
Figure CN223584067U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of energy storage motor control, especially the rotation and stop control of DC motor or single-phase AC motor in circuit breaker and disconnecting switch. BACKGROUND
[0002] The circuit breaker and spring mechanism disconnecting switch in the transformer substation need to use motor for energy storage. At present, the energy storage motor in the mechanism box is generally controlled by using relay and high-power contactor. The AC contactor is high in price and large in size, and a small-size control scheme of energy storage motor is urgently needed in the design of primary equipment intelligence. The utility model provides an energy storage motor control circuit, which is compatible with the rotation and stop control of AC and DC motors, solves the problem of relay contact arc during breaking of large current, and can realize control of the motor by using small-size onboard relay, and can also monitor motor operating current, thereby providing a reliable solution for intelligent control of energy storage motor. SUMMARY
[0003] To solve the above problems, the utility model provides an energy storage motor control circuit, and the specific scheme is as follows:
[0004] An energy storage motor control circuit comprises a CPU control component, a relay component, an electronic switch component, a motor current detection component, a motor and a motor power supply;
[0005] The CPU control component comprises a CPU minimum circuit and an ADC;
[0006] The relay component comprises a relay driving device, a relay control power supply and an onboard normally open relay, and the onboard normally open relay comprises a coil and a contact;
[0007] The electronic switch component comprises an energy absorption resistor, an IGBT device and an IGBT driving device, the IGBT device is divided into a G pole, a C pole and an E pole, and the IGBT driving device is divided into a high-voltage side and a low-voltage side;
[0008] The motor current detection component comprises a current detection device and a current signal conditioning device, and the current signal conditioning device is divided into a high-voltage side and a low-voltage side;
[0009] The motor can be a DC motor or a single-phase AC motor.
[0010] Further, the CPU control component is connected with the relay component, the relay component is connected with the electronic switch component, the CPU control component is connected with the electronic switch component, the electronic switch component is connected with the motor current detection component, the motor current detection component is connected with the CPU control component, and the motor current detection component is connected with the motor.
[0011] Further, the CPU control component is connected with the relay component, in particular, the CPU control component is connected with the relay driving device;
[0012] The relay driving device is connected with the negative pole of the coil in the on-board always-on relay;
[0013] The positive pole of the coil is connected with the relay control power supply;
[0014] The positive pole (DC) or L line (AC) of the motor power supply is connected with the contact in the on-board always-on relay.
[0015] Further, the relay component is connected with the electronic switch component, in particular, the contact in the on-board always-on relay is connected with the C pole of the IGBT device.
[0016] Further, the CPU control component is connected with the electronic switch component, in particular, the CPU control component is connected with the low-voltage side of the IGBT driving device;
[0017] The high-voltage side of the IGBT driving device is connected with the G pole of the IGBT device;
[0018] The energy absorption resistor is connected between the C pole and the E pole of the IGBT device.
[0019] Further, the electronic switch component is connected with the motor current detection component, in particular, the E pole of the IGBT device is connected with the current detection device.
[0020] Further, the motor current detection component is connected with the CPU control component, in particular, the low-voltage side of the current signal conditioning device is connected with the ADC;
[0021] The high-voltage side of the current signal conditioning device is connected with the current detection device.
[0022] Further, the motor current detection component is connected with the motor, in particular, the current detection device is connected with the motor;
[0023] The motor is connected with the negative pole (DC) or N line (AC) of the motor power supply.
[0024] Further, the current detection device is used for monitoring the current of the motor.
[0025] Further, the energy storage motor control circuit has two control modes, i.e. motor rotation and motor stop, and the motor stop is divided into DC motor stop and AC motor stop;
[0026] The motor rotates: in the motor stop state, the CPU control component obtains a motor rotation signal, controls the contact of the on-board normally open relay to be closed through the drive energy storage motor control circuit, and further controls the IGBT device to be turned on; the motor power is connected to the motor through the current path of the on-board normally open relay, the IGBT device and the current detection device, that is, the motor starts to rotate;
[0027] The DC motor stops: the CPU control component controls the electronic switch component to be disconnected, and after the electronic switch component is completely disconnected, the CPU control component controls the on-board normally open relay to be disconnected, so that the current path of the motor power connected to the motor through the on-board normally open relay, the IGBT device and the current detection device is completely disconnected, so that the motor stops rotating due to power loss;
[0028] The AC motor stops: the CPU control component controls the electronic switch component to be disconnected, the motor current detection component judges the current size in the energy storage motor control circuit, and the relay component contact is turned off when the current is zero, so that the current path of the motor power connected to the motor through the on-board normally open relay, the IGBT device and the current detection device is completely disconnected, and the motor stops rotating due to power loss.
[0029] Further, when the DC motor stops, the electronic switch component is directly used for control and shutdown; when the AC motor stops, the electronic switch component is first turned off, the current in the circuit is controlled to be half-wave current, the motor current detection component is used for monitoring the current, and the relay component is controlled to be disconnected when the current is zero.
[0030] Compared with the prior art, the utility model has the following characteristics:
[0031] The utility model provides a kind of energy storage motor control circuit, and motor is controlled by relay and electronic switch series connection.Compared with prior art, it has the following advantages:
[0032] 1, using on-board relay and IGBT device, small and exquisite;
[0033] 2, compatible DC motor and single-phase AC motor control;
[0034] 3, with current detection function, motor current can be detected in real time when motor is running, with motor current online monitoring function;
[0035] 4, solve the problem of relay contact arc when breaking large current, improve the service life of relay contact. BRIEF DESCRIPTION OF DRAWINGS
[0036] Figure 1 This is a schematic diagram of an energy storage motor control circuit. Detailed Implementation
[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0038] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.
[0039] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.
[0040] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0041] Example 1
[0042] like Figure 1 As shown, an energy storage motor control circuit includes a CPU control component, a relay component, an electronic switch component, a motor current detection component, a motor, and a motor power supply;
[0043] The CPU control component includes a CPU minimum circuit and an ADC;
[0044] The relay assembly includes a relay driver, a relay control power supply, and an onboard normally open relay, wherein the onboard normally open relay includes a coil and contacts.
[0045] The electronic switch assembly includes an energy-absorbing resistor, an IGBT device, and an IGBT driver device. The IGBT device is divided into a gate (G), a collector (C), and an emitter (E) terminal, and the IGBT driver device is divided into a high-voltage side and a low-voltage side.
[0046] The motor current detection component comprises a current detection device and a current signal conditioning device, and the current signal conditioning device is divided into a high-voltage side and a low-voltage side.
[0047] The motor can be a direct current motor or a single-phase alternating current motor.
[0048] The CPU control component is connected with the relay component; the relay component is connected with the electronic switch component; the CPU control component is connected with the electronic switch component; the electronic switch component is connected with the motor current detection component; the motor current detection component is connected with the CPU control component; and the motor current detection component is connected with the motor.
[0049] The CPU control component is connected with the relay component, and specifically, the CPU control component is connected with the relay driving device.
[0050] The relay driving device is connected with the negative pole of the coil in the on-board normally open relay.
[0051] The positive pole of the coil is connected with the relay control power supply.
[0052] The positive pole (direct current) or L line (alternating current) of the motor power supply is connected with the contact in the on-board normally open relay.
[0053] The relay component is connected with the electronic switch component, and specifically, the switch in the on-board normally open relay is connected with the C pole of the IGBT device.
[0054] The CPU control component is connected with the electronic switch component, and specifically, the CPU control component is connected with the low-voltage side of the IGBT driving device.
[0055] The high-voltage side of the IGBT driving device is connected with the G pole of the IGBT device.
[0056] The energy absorption resistor is connected between the C pole and the E pole of the IGBT device.
[0057] The electronic switch component is connected with the motor current detection component, and specifically, the E pole of the IGBT device is connected with the current detection device.
[0058] The motor current detection component is connected with the CPU control component, and specifically, the low-voltage side of the current signal conditioning device is connected with the ADC.
[0059] The high-voltage side of the current signal conditioning device is connected with the current detection device.
[0060] The motor current detection component is connected with the motor, and specifically, the current detection device is connected with the motor.
[0061] The motor is connected with the negative pole (DC) or N line (AC) of the motor power supply.
[0062] The current detection device is used for monitoring the current of the motor.
[0063] The energy storage motor control circuit has two control modes, i.e., motor rotation and motor stop, and the motor stop is divided into DC motor stop and AC motor stop.
[0064] The motor rotation: in the motor stop state, after the CPU control component obtains the motor rotation signal, the contact of the on-board normally open relay in the on-board normally open relay is controlled to be closed through the driving energy storage motor control circuit, and the IGBT device is further controlled to be turned on; the motor power supply is connected to the motor through the on-board normally open relay, the IGBT device and the current detection device, that is, the motor starts to rotate.
[0065] The DC motor stop: the CPU control component controls the electronic switch component to be disconnected, after the electronic switch component is completely turned off, the CPU control component controls the on-board normally open relay to be disconnected, so that the motor power supply is completely disconnected from the motor through the on-board normally open relay, the IGBT device and the current detection device, so that the motor stops rotating due to power loss.
[0066] The AC motor stop: the CPU control component controls the electronic switch component to be disconnected, the motor current detection component judges the size of the current in the energy storage motor control circuit, and when the current is zero, the contact of the relay component is turned off, so that the motor power supply is completely disconnected from the motor through the on-board normally open relay, the IGBT device and the current detection device, and the motor stops rotating due to power loss.
[0067] When the DC motor stops, the electronic switch component is directly used for control and turn-off; when the AC motor stops, the electronic switch component is first turned off, the current in the circuit is controlled to be half-wave current, the motor current detection component is used for monitoring the current, and when the current is zero, the relay component is controlled to be disconnected.
[0068] Those skilled in the art can understand that the units of each example described in combination with the embodiments disclosed in the present embodiment can be realized in electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the components of each example have been described in the above description in a general manner. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.
[0069] In the embodiments provided in the present application, it should be understood that the division of units is only a logical functional division, and there can be another division manner in actual implementation, for example, a plurality of units can be combined as one unit, one unit can be split into a plurality of units, or some features can be ignored, etc.
[0070] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application.
Claims
1. An energy storage motor control circuit, characterized by, The circuit comprises a CPU control component, a relay component, an electronic switch component, a motor current detection component, a motor and a motor power supply; The CPU control component comprises a CPU minimum circuit and an ADC; The relay component comprises a relay drive device, a relay control power supply and a built-in normally open relay, and the built-in normally open relay comprises a coil and a contact; The electronic switch component comprises an energy absorption resistor, an IGBT device and an IGBT drive, the IGBT device is divided into a G pole, a C pole and an E pole, and the IGBT drive is divided into a high-voltage side and a low-voltage side; The motor current detection component comprises a current detection device and a current signal conditioning device, and the current signal conditioning device is divided into a high-voltage side and a low-voltage side; The motor can be a direct current motor or an alternating current motor.
2. A control circuit for an energy storage motor as claimed in claim 1, wherein The CPU control component is connected with the relay component; The relay component is connected with the electronic switch component; The CPU control component is connected with the electronic switch component; The electronic switch component is connected with the motor current detection component; The motor current detection component is connected with the CPU control component; The motor current detection component is connected with the motor.
3. A control circuit for an energy storage motor as defined in claim 1, wherein The CPU control component is connected with the relay component, and specifically connected with the relay drive device; The relay drive device is connected with the negative pole of the coil in the built-in normally open relay; The positive pole of the coil is connected with the relay control power supply; The positive pole (direct current) or L line (alternating current) of the motor power supply is connected with the switch in the built-in normally open relay.
4. A control circuit for an energy storage motor as defined in claim 1, wherein The relay component is connected with the electronic switch component, and specifically the contact in the built-in normally open relay is connected with the C pole of the IGBT device.
5. A control circuit for an energy storage motor as defined in claim 1, wherein, The CPU control component is connected with the electronic switch component, and specifically connected with the low-voltage side of the IGBT drive; The high-voltage side of the IGBT drive is connected with the G pole of the IGBT device; The energy absorption resistor is connected between the C pole and the E pole of the IGBT device.
6. A control circuit for an energy storage motor as defined in claim 1, wherein, The electronic switch component is connected with the motor current detection component, and specifically the E pole of the IGBT device is connected with the current detection device.
7. A control circuit for an energy storage motor as defined in claim 1, wherein The motor current detection component is connected with the CPU control component, and specifically the low-voltage side of the current signal conditioning device is connected with the ADC; The high-voltage side of the current signal conditioning device is connected with the current detection device.
8. A control circuit for an energy storage motor as defined in claim 1, wherein, The motor current detection component is connected with the motor, and specifically the current detection device is connected with the motor; The motor is connected with the negative pole (direct current) or N line (alternating current) of the motor power supply.
9. A control circuit for an energy storage motor as defined in claim 1, wherein, The current detection device is used for monitoring the current of the motor.
10. A control circuit for an energy storage motor as defined in claim 1, wherein, The energy storage motor control circuit has two control modes, i.e. motor rotation and motor stop, and the motor stop is divided into direct current motor stop and alternating current motor stop; The motor rotates: in the motor stop state, the CPU control component obtains the motor rotation signal, controls the contact of the on-board normally open relay to close through the drive energy storage motor control circuit, and further controls the IGBT device to conduct; the motor power is connected to the motor through the on-board normally open relay, the IGBT device and the current detection device, that is, the motor starts to rotate; The DC motor stops: the CPU control component controls the electronic switch component to be disconnected, and after the electronic switch component is completely turned off, the CPU control component controls the on-board normally open relay to be disconnected, so that the motor power is completely disconnected through the on-board normally open relay, the IGBT device and the current detection device, and the current path to the motor, so that the motor stops rotating due to power loss; The AC motor stops: the CPU control component controls the electronic switch component to be disconnected, the motor current detection component judges the current size in the circuit of claims 1-9, and the relay component contact is turned off when the current is zero, so that the motor power is completely disconnected through the on-board normally open relay, the IGBT device and the current detection device, and the current path to the motor, and the motor stops rotating due to power loss.
11. A control circuit for an energy storage motor as claimed in claim 10, wherein When the DC motor stops, the electronic switch component is directly used for control and shutdown; when the AC motor stops, the electronic switch component is first turned off, the current in the circuit is controlled to be half-wave current, the motor current detection component is used for monitoring the current, and the relay component is controlled to be disconnected when the current is zero.