Title:
DRIVE FOR MULTISPEED RANGE STARTER GENERATOR
Document Type and Number:
Japanese Patent JPS61218848
Kind Code:
A
Abstract:
A starter-generator drive usable in an aircraft must be of the smallest possible size and the lowest possible weight and have maximum reliability. A drive having a multi-speed transmission and a controllable hydro-viscous dissipative clutch can be interposed between an engine and a starter-generator to achieve maximum efficiency in the drive and meets the foregoing objectives. The starter-generator drive has a multi-speed transmission for stepping the input speed from an engine to a hydro-viscous dissipative clutch to provide plural speed ranges of operation and thus limit the amount of slip that occurs within the clutch in each range to provide the constant speed drive of the generator. The dissipative clutch operates in a hydro-viscous manner whereby sudden changes of speed, as the multi-speed transmission shifts, do not vary the torque transmitted to the generator and therefore the speed of the generator. This avoids transients in the output power frequency of the generator during ratio changing of the multi-speed transmission. The starter-generator drive also provides for dissipative engine start utilizing the generator as an electric motor.
Inventors:
MAIKERU EI KOODONAA
Application Number:
JP5847286A
Publication Date:
September 29, 1986
Filing Date:
March 18, 1986
Export Citation:
Assignee:
SUNDSTRAND CORP
International Classes:
F02C7/268; F02C7/32; F16H3/72; F02N11/04; F16D35/00; (IPC1-7): F16D35/00; F16H3/72
Attorney, Agent or Firm:
Michiteru Soga