Patent ID: 6307275
Filing Date: 2001-10-23
Classification: F02N,H02P

Abstract:
A method for starting a turbo engine coupled to a rotary machine for a given DC bus voltage, said method comprising the steps of:accelerating the rotary machine to a turbo warm-up speed along a low-speed V/f profile;starting the turbo engine at a turbo starting speed, where said turbo starting speed is less than said turbo warm-up speed;maintaining the rotary machine at said turbo warm-up speed for a predetermined time to warm-up the turbo engine;thereafter, accelerating the rotary machine from said turbo-warm-up speed to a switching speed along said low-speed V/f profile having a first slope;thereafter, accelerating the rotary machine from said switching speed to a second speed along a high-speed V/f profile having a second slope;thereafter, accelerating the rotary machine from said second speed to a turbo uncoupling speed; anduncoupling the rotary machine from the turbo engine; andaccelerating the turbo engine from said turbo uncoupling speed to a desired speed.