Electromagnetic interference suppression component and protection component assembly for a motor
AssigneesLittelfuse Electronics (Shanghai) Co., Ltd., Littelfuse France SAS
InventorsWerner Johler, Philippe Di Fulvio
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Abstract
An electromagnetic interference (EMI) circuit assembly includes a first, second, and third conductive layer. A protection component disposed between the first and second conductive layers. A dielectric layer is disposed between the second and the third conductive layers. The protection component is configured to protect a load from one or both of an overcurrent condition and an over temperature condition, and the third layer define a capacitor configured to suppress EMI signals.
Claims8
An electromagnetic interference (EMI) circuit assembly comprising:
- a first, a second, a third, a fourth and a fifth conductive layer;
- a first dielectric layer disposed between the first and the second conductive layers to thereby define a first capacitor;
- a voltage-dependent resistive material layer disposed between the second and the third conductive layers to thereby define a varistor;
- a second dielectric layer disposed between the third and the fourth conductive layers to thereby define a second capacitor;
- and
- a protection component disposed between the third and the fifth conductive layers to configured to protect a load from one or both of an overcurrent condition and an over temperature condition.
A motor assembly comprising:
- a motor housing formed at least partially of a conductive material, the motor housing includes a first and a second terminal for receiving power;
- an electric motor disposed within the housing, the electric motor includes first and second power terminals;
- an EMI circuit assembly according to claim 12 disposed within the motor housing, wherein:
- the first and fourth conductive layers of the EMI circuit assembly are electrically coupled to the motor housing,
- the second conductive layer of the EMI circuit assembly is electrically coupled to the first terminal of the electrical motor and the first terminal of the motor housing;
- the third conductive layer of the EMI circuit assembly is electrically coupled to the second terminal of the motor housing, and
- the fifth conductive layer of the EMI circuit assembly is electrically coupled to the second power terminal of the electric motor.
Dependencies are inferred from the claim text.