Thread: What are the techniques to increase the power output without decreasing efficiency of Electric motor?

We want to build energy efficient plugin battery vehicle , i want to find out the ways or techniques by which we can increase power output of our motor without decreasing the efficiency. For example there are superchargers or turbocharger for IC Engines , is there any Device available in the local market which can increase the power output of our motor without decreasing the efficiency.?

Most well designed electric motors are over 90% efficient, and that number is higher for larger motors, approaching 98%.

So your best approach is to use a well designed high efficiency motor to start with.

Other important factors are: 1. power efficient speed control because you can lose a lot of power there if you are not careful. 2. Well designed dynamic braking system to recover power normally lost to the brakes. This impacts the overall design as you need to keep extra capacity in the battery so the dynamic braking system has someplace to dump the power.

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You can buy a more powerful motor that will probably be more efficient than the one you have. In general, more powerful motors are more efficient. If you want buy a motor that is more powerful but not physically larger, buy a motor that operates at a higher speed. The physical size of a motor is determined more by its torque rating than its speed rating. Power is proportional to torque multiplied by speed.

For an existing motor, you may be able to operate the motor at a higher speed, but you need to find out from the manufacturer if that can be done without damaging the motor or reducing its life to an unacceptable extent. To increase the speed, you need a suitable speed controller and likely a higher battery voltage.