Air conditioning valve actuator for a motor vehicle

Details Air conditioning valve actuator for a motor vehicle Air conditioning valve actuator for a motor vehicle

2005-02-08

2005-02-08

Ip, Paul (Department: 2837)

Electricity: motive power systems

Positional servo systems

Adaptive or optimizing systems including 'bang-bang' servos

C318S663000, C318S666000, C310S089000, C123S399000

Reexamination Certificate

active

06853160

ABSTRACT:
An air conditioning valve actuator for a motor vehicle operating on an electric step motor with a permanent magnet capable of delivering mechanical power at least equal to 50 mW, and a reduction unit for decreasing the amplitude of the angular pitch and increase the output torque. The motor is defined by the following relationship: 10−6<γ2/R0<, wherein: γ is the torque constant, proportional to the magnet volume and, R0is the characteristic coefficient of the volume of copper and the length of the average turn of the coils, in which R0=ρ.Lsp/(Scu.σ), ρ being the resistivity of copper, Lsp being the length of the average turn of a coil, Scu being the copper section of a coil and σ the filling coefficient of a coil. A controller is cooperative with the motor power supply enabling to accelerate gradually the frequency of the supply of the windings.

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