Electronic oil pump short circuit detection system
By using an external isolated DC power supply and detection components to detect voltage or current, the accuracy and cost issues of short-circuit detection in electronic oil pumps in the prior art are solved, providing a low-cost and universal detection method applicable to three-phase electronic control assemblies.
Patent Information
- Application Number
- CN202423157657.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-20
AI Technical Summary
In the existing technology, the short circuit detection of electronic oil pumps has the problem of being unable to accurately measure the circuit impedance, or the presence of other capacitors or PN junctions. In addition, the dedicated circuit detection is costly and lacks universality.
It employs an external isolated power supply DC, resistor R, and detection components to determine whether the MOSFET is short-circuited to the assembly housing by detecting voltage or current. The detection components include relays and PLCs or LEDs, which are suitable for three-phase electronic control assemblies, reducing the number of components and lowering costs.
It enables low-cost, universal short-circuit detection of electronic oil pumps, avoiding direct damage to the device, and provides two arrangement methods suitable for detection with or without a host computer.
Smart Images
Figure CN223857378U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to power electronics technical field especially relates to a kind of electronic oil pump short circuit detection system. BACKGROUND
[0002] In prior art, electronic oil pump short circuit detection is generally measured directly using multimeter or buzzer, with the shortcomings that circuit impedance slightly large cannot be accurately measured, circuit with remaining capacitor or PN junction cannot be effectively measured, or special circuit is used for detection, with higher detection accuracy and more detectable circuits, but with the shortcomings of special development, higher speciality, non-universal and higher cost. SUMMARY
[0003] The utility model provides a kind of electronic oil pump short circuit detection system, can detect the short circuit of MOSFET with certain circuit complexity and assembly shell at low cost, to solve the technical problems of circuit with remaining capacitor or PN junction cannot be effectively measured and higher cost in background technology by using special circuit.
[0004] The technical scheme of the utility model is as follows: a kind of electronic oil pump short circuit detection system, comprising: external isolation power supply DC, resistance R and detection component, one pole of the external isolation power supply DC is connected with one end of the resistance R, the other end of the resistance R is connected with the source electrode of MOS tube in the three-phase motor assembly of the electronic oil pump and is connected with signal ground, the other pole of the external isolation power supply DC is connected with one end of the detection component, the other end of the detection component is connected with the shell of the three-phase motor assembly of the electronic oil pump, and the detection component is used to detect voltage or current.
[0005] Further, the external isolation power supply DC includes battery.
[0006] Further, the detection component includes relay and PLC, the control end of the relay is connected with the shell of the three-phase motor assembly, one of the normally open contact ends of the relay is connected with the negative pole of the external isolation power supply DC, one end of the resistance R is connected with the positive pole of the external isolation power supply DC, and the other normally open contact end of the relay is connected with the detection port of the PLC.
[0007] Further, the PLC is connected with host computer.
[0008] Further, the detection component includes light emitting diode D1, the positive pole of the light emitting diode D1 is connected with the shell of the three-phase motor assembly of electronic oil pump, the negative pole of the light emitting diode D1 is connected with the positive pole of the external isolation power supply DC, and one end of the resistance R is connected with the negative pole of the external isolation power supply DC.
[0009] The utility model discloses a beneficial effect: the utility model discloses be applicable to the detection of three -phase electronic control assembly, low cost, use device less. The utility model discloses detection circuit does not directly pass through MOSFET, and the equipment current flows through body diode, will not cause damage to device, reduce the device used simultaneously. The utility model provides two kinds of arrangement methods, is applicable to the detection of with host computer and does not use the detection of host computer. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 It is the structural diagram of the utility model.
[0011] Figure 2 It is the structural schematic diagram of the utility model embodiment 1.
[0012] Figure 3 It is the structural schematic diagram of the utility model embodiment 2. DETAILED DESCRIPTION
[0013] In order to make the person skilled in the art better understand the utility model scheme, below will combine the drawings in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, and the described embodiment is only a part of the embodiment of the utility model, not all. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of the utility model protection.
[0014] In the embodiment of the utility model, Figure 1 It is the structural diagram provided according to the specific structure of the utility model electronic oil pump short circuit detection system, as Figure 1 As shown, the utility model specifically includes:
[0015] External isolation power supply DC, resistance R and detection component 1, one pole of the external isolation power supply DC is connected with one end of the resistance R, the other end of the resistance R is connected with the source electrode of the MOS tube in the three -phase motor assembly of the electronic oil pump and is connected with signal ground, the other pole of the external isolation power supply DC is connected with one end of the detection component 1, the other end of the detection component 1 is connected with the shell 2 of the three -phase motor assembly of the electronic oil pump, and the detection component 1 is used to detect voltage or current.
[0016] With Figure 1 As shown in the figure, if the drain level of the MOS tube in the three -phase motor assembly and the shell 2 of the three -phase motor assembly short circuit, then the external isolation power supply DC, resistance R and detection component 1 and the body diode of the MOS tube will form a loop, so that the detection component 1 can detect current or voltage, realize short circuit detection.
[0017] Among them, the external isolation power supply DC includes a battery.
[0018] In one embodiment of this utility model, the detection component 1 includes a relay 11 and a PLC 12. The control terminal of the relay 11 is connected to the housing 2 of the three-phase motor assembly. One normally open contact of the relay 11 is connected to the negative terminal of the external isolated power supply DC, and the positive terminal of the external isolated power supply DC is connected to one end of the resistor R. The other normally open contact of the relay 11 is connected to the detection port of the PLC 12. The PLC 12 is connected to a host computer, which displays the level of the detection port of the PLC 12 to visually indicate whether a short circuit has occurred. Specifically, the detection port of the PLC 12 is a GPIO port.
[0019] Specifically, such as Figure 2 As shown, Figure 2 The diagram illustrates the presence and absence of a short circuit. A short circuit is equivalent to the switch closing and connecting Phase to housing 2. However, this switch is not actually present during testing and is for illustrative purposes only. An external isolated DC power supply can be a battery. The positive terminal is connected to the source test point of the MOSFET in the three-phase motor assembly, or to a connected network. The negative terminal is connected to the contact of relay 11. Housing 2 of the oil pump is connected to the control terminal of relay 11, and the contact of relay 11 is connected to the GPIO port of PLC 12. Judgment criteria: If Phase is not short-circuited to housing 2, the contact of relay 11 is open, and PLC 12 detects a low voltage. If Phase is short-circuited to housing 2, the contact of relay 11 is closed, and PLC 12 detects a high level.
[0020] In one embodiment of this utility model, the detection component 1 includes a light-emitting diode D1, the positive terminal of which is connected to the housing 2 of the three-phase motor assembly of the electronic oil pump, the negative terminal of which is connected to the positive terminal of the external isolation power supply DC, and the negative terminal of the external isolation power supply DC is connected to one end of the resistor R.
[0021] Figure 3 This is a schematic diagram of a short circuit. An external isolation power supply DC is connected in series with an LED D1, which is then connected to the MOSFET and ground. When a short circuit occurs, the external isolation power supply DC, the LED D1, and the body diode of the MOSFET form a circuit, causing the LED to light up. Therefore, if the LED lights up, it is determined to be a short circuit.
[0022] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.
Claims
1. An electronic oil pump short circuit detection system characterized by comprising: The application relates to an electronic oil pump, which comprises the following components: An external isolation power supply DC, a resistor R and a detection assembly (1), one pole of the external isolation power supply DC is connected with one end of the resistor R, the other end of the resistor R is connected with the source electrode of a MOS tube in a three-phase motor assembly of the electronic oil pump and is connected with a signal ground, the other pole of the external isolation power supply DC is connected with one end of the detection assembly (1), the other end of the detection assembly (1) is connected with the shell (2) of the three-phase motor assembly of the electronic oil pump, and the detection assembly (1) is used for detecting voltage or current.
2. The electronic oil pump short detection system of claim 1, wherein The external isolation power supply DC comprises a battery.
3. The electronic oil pump short detection system of claim 1, wherein The detection assembly (1) comprises a relay (11) and a PLC (12), the control end of the relay (11) is connected with the shell (2) of the three-phase motor assembly, one normally open contact end of the relay (11) is connected with the negative pole of the external isolation power supply DC, one end of the resistor R is connected with the positive pole of the external isolation power supply DC, and the other normally open contact end of the relay (11) is connected with the detection port of the PLC (12).
4. The electronic oil pump short detection system of claim 3, wherein The PLC (12) is connected with an upper computer.
5. The electronic oil pump short detection system of claim 1, wherein The detection assembly (1) comprises a light emitting diode D1, the positive pole of the light emitting diode D1 is connected with the shell (2) of the three-phase motor assembly of the electronic oil pump, the negative pole of the light emitting diode D1 is connected with the positive pole of the external isolation power supply DC, and one end of the resistor R is connected with the negative pole of the external isolation power supply DC.