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US 6,926,288 B2Granted
Electromagnetic interference filter
AssigneeBose Corporation
InventorPaul T. Bender
Life of this patent
Estimating the term…
Abstract
An electromechanical actuator in a vehicle suspension system includes a housing having a first section adapted to affix to a vehicle body and a second section adapted to affix to a vehicle wheel assembly suspended to the vehicle body, the first and second sections coupled to form a motor, electronics including a power-switching devices disposed within a chamber of the housing and adapted to receive electrical power and to direct power to the motor, and a filter board including capacitors and inductors disposed within the chamber to suppress noise generated by the power-switching devices to an external DC power source.
Claims93
An electromechanical actuator comprising:
- in a vehicle suspension system, a housing having a first section adapted to affix to a vehicle body and a second section adapted to affix to a vehicle wheel assembly suspended to the vehicle body, the first and second sections coupled to form a motor;
- electronics including power-switching devices disposed within a chamber of the housing and adapted to receive electrical power and to direct power to the motor;
- and
- a filter board comprising capacitors and inductors disposed within the chamber to suppress noise generated by the power-switching devices conducted to an external direct current (DC) power source.
1 more element
An electromechanical actuator system comprising:
- in a vehicle suspension system, a housing having a first section adapted to affix to a vehicle body and a second section adapted to affix to a vehicle wheel assembly suspended to the vehicle body, the first and second sections coupled to form a motor;
- electronics including power-switching devices disposed within a chamber of the housing and adapted to receive electrical power and to direct power to the motor;
- and
- a filter board disposed within the chamber, the filter board comprising a multisection ladder filter with dampening resistance designed to fit within a package having a predetermined volume.
1 more element
An electromechanical actuator comprising:
- in a vehicle suspension system, a housing having a first section adapted to affix to a vehicle body and a second section adapted to affix to a vehicle wheel assembly suspended to the vehicle body, the first and second sections coupled to form a motor;
- electronics including power-switching devices disposed within a chamber of the housing and adapted to receive electrical power and to direct power to the motor;
- and
- a filter board disposed within the chamber and positioned between the power-switching devices and an external DC power source, the filter board cutoff frequency designed to facilitate the power-switching devices to switch at a predetermined switching frequency.
1 more element
An electromechanical actuator comprising:
- in a vehicle suspension system, a housing having a first section adapted to affix to a vehicle body and a second section adapted to affix to a vehicle wheel assembly suspended to the vehicle body, the first and second sections coupled to form a motor;
- electronics including power-switching devices disposed within a chamber of the housing and adapted to receive electrical power and to direct power to the motor;
- and
- a filter board disposed within the chamber and positioned between the power-switching devices and an external DC power source, the filter board having specific vibration tolerance characteristics.
1 more element
An electromechanical actuator comprising:
- in a vehicle suspension system, a housing having a first section adapted to affix to a vehicle body and a second section adapted to affix to a vehicle wheel assembly suspended to the vehicle body, the first and second sections coupled to form a motor;
- electronics including power-switching devices disposed within a chamber of the housing and adapted to receive electrical power and to direct power to the motor;
- and
- a filter board disposed within the chamber and positioned between the power-switching devices and an external DC power source, the filter board designed to meet specific EMI emission specifications.
1 more element
An electromechanical actuator comprising:
- in a vehicle suspension system, a housing having a first section adapted to affix to a vehicle body and a second section adapted to affix to a vehicle wheel assembly suspended to the vehicle body, the first and second sections coupled to form a motor;
- electronics including power-switching devices disposed within a chamber of the housing and adapted to receive electrical power and to direct power to the motor;
- and
- a filter board with a power density at least 0.0143 watts/cubic millimeter disposed within the chamber to suppress noise generated by the power-switching devices conducted to an external DC power source.
1 more element
An electromechanical actuator comprising:
- in a vehicle suspension system, a housing having a first section adapted to affix to a vehicle body and a second section adapted to affix to a vehicle wheel assembly suspended to the vehicle body, the first and second sections coupled to form a motor;
- electronics including power-switching devices disposed within a chamber of the housing and adapted to receive electrical power and to direct power to the motor;
- and
- a filter board having a mass density substantially equal to 0.0000007 kg per cubic millimeter disposed within the chamber to suppress noise generated by the power-switching devices to an external DC power source.
1 more element
An electromechanical actuator system comprising:
- in a vehicle suspension system, a housing having a first section adapted to affix to a vehicle body and a second section adapted to affix to a vehicle wheel assembly suspended to the vehicle body, the first and second sections coupled to form a motor;
- electronics including power-switching devices disposed within a chamber of the housing and adapted to receive electrical power from an external power supply via a power supply line and to direct power to the motor;
- and
- a filter board disposed within the chamber, the filter board comprising a large inductor positioned between the external power supply and the power-switching devices via the power supply line.
1 more element
Dependencies are inferred from the claim text.