Electrical variable-speed case and its dynamic mode

Abstract

The present invention is electrical stepless speed variator and its driving mode. The electrical stepless speed variator has a planetary sun gear connected to the inner rotor of the double mechanical port motor, a planetary ring gear connected through a clutch to the outer rotor of the motor, the clutch for controlling the connection and disconnection between the outer rotor and the ring gear, the first brake between the ring gear and the casing of the power assembly for braking the ring gear, and the second brake between the engine shaft and the casing of the power assembly for braking the engine. By switching with these two brakes and the clutch, the vehicle may be switched in different driving modes; and controlling the rotation speed of the inner rotor can control the switching of the electrical stepless speed variator in different mixed driving modes.

Description

technical field [0001] The invention relates to an electric continuously variable transmission and its power mode, in particular to an electric continuously variable transmission for vehicles and its power mode. Background technique [0002] The dual mechanical port motor is a new type of motor with two mechanical ports that can operate independently and be controlled independently. This new type of motor appears in many invention patents at home and abroad. Such as Chinese patent CN1945939 "Double mechanical port motor and its drive control system", CN1738163 "Dual rotor hybrid composite permanent magnet motor", Chinese patent 200710121112.2 "A kind of electric stepless transmission", CN2865127 utility model patent "A kind of motor for vehicles "Electric automatic transmission with direct drive function", and foreign invention patents such as US2004026143, WO0034066 and EP1481463. Such electric motors are widely used in new hybrid powertrains. A planetary gear is also a ...

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Problems solved by technology

[0003] In the Chinese patent 200710121112.2 "A Electric Continuously Variable Transmission" patent, the planetary gear is only used as a speed-up device, which limits the hybrid mode; at the same time, in the hybrid mode, the engine passes through a speed-up link to transfer energy To the inner rotor, part of the energy is transferred to the outer rotor through electromagnetic coupling to drive the vehicle, and the other part is converted into electric energy by the inner motor and fed back to the battery. The energy conversion and transfer of these two parts are formed by electromagnetic coupling, and there is a relatively large loss ; At the same time, due to the speed-up link, the absolute speed of the internal motor is relatively high, which brings inconvenience to the manufacturing and process

200710121112.2 In "A Kind of Electric Continuously Variable Transmission", there is a friction plate of the clutch on the sun gear. When the clutch is closed, the planet carrier, the outer ring gear, the sun gear and the outer rotor of the motor with dual mechanical ports are locked together, and the speed is the same as that of the engine. rotation, so the clutch structure is complicated and difficult to realize

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