Submicron electric car driven by electric machine with hub

Abstract

The invention provides an ultra-micro electric car driven by a hub motor. Hub motors which are specially designed are installed on wheels of the electric car and directly drive the electric car to run without gearboxes and transmission devices, and the electric car has high energy efficiency ratio, low noise and no exhaust pollution. The combination of the pole changing of the hub motor and the frequency conversion of a frequency inverter is used in variable-speed control of the electric car, so as to ensure the wider scope of speed regulation for the electric car and better performance in climbing, heavy-load startup and low-speed running. The wheels and a brake disc or a brake drum are arranged at the outer edge of an end cover inside the hub motor or on a ring flange inside a motor casing, so as to ensure the outer end of wheel axles to have lower stress, more reasonable stress distribution, better integrity between the wheels and a brake device and stronger impact resistance. The design of an ultra-micro car body with the door opening at one side and two rows with threes seats or two rows with two seats can ensure simpler structure of the whole car and low manufacturing cost, so that the ultra-micro electric car can replace a motorcycle so as to be used in public transport.

Description

Technical field [0001] The invention relates to an electric vehicle, in particular to an ultra-miniature electric car driven by a hub motor. Background technique [0002] The number of household motorcycles in urban and rural areas across the country is very large. Due to the high energy consumption of motorcycles, serious noise and exhaust pollution, and frequent traffic accidents, many cities have begun to prohibit motorcycles from running. Consumers look forward to a mass transportation that can replace motorcycles. There is a light-duty electric vehicle on the market, which adopts a single row, two seats and two doors. The car body is relatively large, and the cost is relatively high. At the same time, the driving mode of the main power motor and the transmission device is adopted, and the energy efficiency ratio is low, and the practicability is relatively poor. The electric car driven by the hub motor reduces the number of engines and transmissions, which can improve ...

AI Technical Summary

Problems solved by technology

There is a light-duty electric vehicle on the market, which adopts a single row, two seats and two doors. It has a large body and a high cost. At the same time, it adopts the driving mode of the main power motor and the transmission device, which has low energy efficiency ratio and poor practicability.

The electric car driven by the hub motor reduces the number of engines and transmissions, which can improve the energy efficiency ratio and is conducive to the miniaturization of the electric car. Improvements are needed. The driving method of the hub motor and the installation and connection method with the wheel and suspension are not mature enough technically. Therefore, small electric cars driven by the hub motor and with excellent performance have not been able to really enter the market.

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