Electrical control assembly and electrical device

Patent metadata

Field	Value
Publication number	US-11601047-B2
Application number	US-201817286484-A
Country	US
Kind code	B2
Filing date	Dec 21, 2018
Priority date	Oct 17, 2018
Publication date	Mar 7, 2023
Grant date	Mar 7, 2023

Abstract

Disclosed are an electric control assembly and an electrical device. The electric control assembly includes an electric control board and a metal plate arranged on one side of the electric control board in parallel. The electric control board includes a first filter circuit and a power supply line. The power supply line includes a power input terminal, a rectifier circuit, an intelligent power module and a power output terminal. The power input terminal, the rectifier circuit, the intelligent power module and the power output terminal are connected in sequence. A first end of the first filter circuit is connected with the power supply line. The metal plate and the electric control board are arranged at an interval. The metal plate is electrically connected with a shell of the electrical load. A second end of the first filter circuit is electrically connected with the metal plate.

First claim

What is claimed is:

1. An electronic control assembly, comprising:
an electric control board, comprising:
a first filter circuit comprising at least one distributed capacitance; and
a power supply line for supplying power to an electrical load, comprising a power input terminal, a rectifier circuit, an intelligent power module and a power output terminal, wherein the power input terminal, the rectifier circuit, the intelligent power module and the power output terminal are successively connected, and a first end of the first filter circuit is connected with the power supply line;
and
a metal plate arranged on one side of the electric control board in parallel, wherein the metal plate and the electric control board are arranged at intervals, the metal plate is electrically connected with a shell of the electrical load, and a second end of the first filter circuit is electrically connected with the metal plate such that a low impedance loop is formed between the first filter circuit, the metal plate, and the shell of the electrical load, wherein an Electro Magnetic Compatibility (EMC) interference signal generated by a source of the EMC interference signal, after reaching the shell of the electrical load, returns to the source of the ECM interference signal through the low impedance loop and is gradually consumed;
wherein the first filter circuit comprises a first capacitor, a first end of the first capacitor is the first end of the first filter circuit, and a second end of the first capacitor is connected with the metal plate;
wherein the first filter circuit further comprises a first resistor and a first inductor, and the first inductor and the first resistor are respectively arranged in series between the second end of the first capacitor and the metal plate.

2. The electronic control assembly according to claim 1 , wherein at least one of positions between the power input terminal and the rectifier circuit, between the rectifier circuit and the intelligent power module, and between the intelligent power module and the power output terminal is connected with one first filter circuit.

3. The electronic control assembly according to claim 2 , wherein the number of the first filter circuits is two, and a power supply line between the power input terminal and the rectifier circuit, and a power supply line between the rectifier circuit and the intelligent power module are respectively connected with first ends of two first filter circuits in one-to-one correspondence;
or, the power supply line between the power input terminal and the rectifier circuit, and a power supply line between the intelligent power module and the power output terminal are respectively connected with the first ends of the two first filter circuits in one-to-one correspondence;
or, the power supply line between the rectifier circuit and the intelligent power module, and the power supply line between the intelligent power module and the power output terminal are respectively connected with the first ends of the two first filter circuits in one-to-one correspondence.

4. The electronic control assembly according to claim 2 , wherein the number of the first filter circuits is three, and first ends of three first filter circuits are respectively connected between the power input terminal and the rectifier circuit, between the rectifier circuit and the intelligent power module, and between the intelligent power module and the power output terminal in one-to-one correspondence.

5. The electronic control assembly according to claim 2 , wherein the power input terminal comprises a neutral wire and a live wire; in response to the first end of the first filter circuit being connected between the power input terminal and the rectifier circuit, the first filter circuit comprises a neutral wire filter unit and a live wire filter unit, and one end of the neutral wire filter unit and one end of the live wire filter unit are respectively connected with the neutral wire and the live wire in one-to-one correspondence, and the other end of the neutral wire filter unit and the other end of the live wire filter unit are connected with the metal plate;
in response to the first end of the first filter circuit being connected between the rectifier circuit and the intelligent power module, the first filter circuit comprises a positive filter unit and a negative filter unit, one end of the positive filter unit and one end of the negative filter unit are respectively connected with the positive output end and the negative output end of the rectifier circuit in one-to-one correspondence and the other end of the positive filter unit and the other end of the negative filter unit are connected with the metal plate;
in response to the first end of the first filter circuit being connected between the intelligent power module and the power output terminal, the first filter circuit comprises a three-phase filter unit, three ends of the three-phase filter unit are respectively connected with a three-phase power source terminal of the power output terminal in one-to-one correspondence, and the other three ends of the three-phase filter unit are connected with the metal plate.

6. The electronic control assembly according to claim 1 , wherein the metal plate is connected with a ground wire of an AC power supply.

7. The electronic control assembly according to claim 1 , wherein the electronic control assembly further comprises an insulating component, and the insulating component is clamped between the electric control board and the metal plate.

8. The electronic control assembly according to claim 1 , wherein a second filter circuit is arranged in series between the metal plate and the shell of the electrical load.

9. The electronic control assembly according to claim 8 , wherein the second filter circuit comprises a first capacitor, a first end of the first capacitor is the first end of the second filter circuit, and a second end of the first capacitor is connected with the metal plate.

10. The electronic control assembly according to claim 9 , wherein the second filter circuit further comprises a first resistor or a first inductor, and the first inductor or the first resistor is arranged in series between the second end of the first capacitor and the metal plate.

11. The electronic control assembly according to claim 9 , wherein the second filter circuit further comprises a first resistor and a first inductor, and the first inductor and the first resistor are respectively arranged in series between the second end of the first capacitor and the metal plate.

12. An electrical device, comprising:
an electronic control assembly, comprising:
an electric control board, comprising:
a first filter circuit comprising at least one distributed capacitance; and
a power supply line for supplying power to an electrical load, comprising a power input terminal, a rectifier circuit, an intelligent power module and a power output terminal, wherein the power input terminal, the rectifier circuit, the intelligent power module and the power output terminal are successively connected, and a first end of the first filter circuit is connected with the power supply line;
and
a metal plate arranged on one side of the electric control board in parallel, wherein the metal plate and the electric control board are arranged at intervals, the metal plate is electrically connected with a shell of the electrical load, and a second end of the first filter circuit is electrically connected with the metal plate such that a low impedance loop is formed between the first filter circuit, the metal plate, and the shell of the electrical load, wherein an Electro Magnetic Compatibility

Assignees

• Guangdong Midea White Home Appliance Tech Innovation Center Co Ltd
• Midea Group Co Ltd

Inventors

• Hu Jian
• Hou Junfeng
• Liang Dingjun
• Zhang Wei

Classifications

• H02M7/003

  Constructional details, e.g. physical layout, assembly, wiring or busbar connections · CPC title

• H02M1/44 Primary

  Circuits or arrangements for compensating for electromagnetic interference in converters or inverters · CPC title

• H02M1/126

  using passive filters · CPC title

• H02K11/02 Primary

  for suppression of electromagnetic interference · CPC title