best electric bike motor image
idk.idkk
i had a 180 watt, 8 amp motor and it blew a 30 amp fuse. i ordered a 1000 watt (at 36v) (745 watt at 25v) motor. it's rated current is 34 amps. what rated amp fuse should i use?
o and it's for an electric bike motor. if anyone knows: could i use a resettable breaker? if so where could i get one that can run off 24 or 36 volts dc??
thanks.
Answer
Electric motors draw a large amount of current on startup and much smaller amounts after they come up to speed. What you need is called a "slow blow fuse". Such fuses can handle up to 10 times the current they are rated to handle for a short period of time, a few seconds or less. The actual fuse rating should be specified by the manufacturer of the motor. In the absence of such a recommendation, use a fuse rated the same or slightly higher than the continuous current rating.
A properly rated circuit breaker should work in place of a fuse.
Here's a 24V resettable circuit breaker rated for 40A. This one should be suitable, since it's intended purpose is to operate a motor and the added startup current would have already been considered in the design.
http://www.marineengine.com/products/accessory.php?in=2971040
Electric motors draw a large amount of current on startup and much smaller amounts after they come up to speed. What you need is called a "slow blow fuse". Such fuses can handle up to 10 times the current they are rated to handle for a short period of time, a few seconds or less. The actual fuse rating should be specified by the manufacturer of the motor. In the absence of such a recommendation, use a fuse rated the same or slightly higher than the continuous current rating.
A properly rated circuit breaker should work in place of a fuse.
Here's a 24V resettable circuit breaker rated for 40A. This one should be suitable, since it's intended purpose is to operate a motor and the added startup current would have already been considered in the design.
http://www.marineengine.com/products/accessory.php?in=2971040
Is it necessary to have a speed controller on electric motor?
Matthew
im unclear if i need a speed control for a 24 volt electric bike motor, instead of just a throttle. i want to know why i would need a speed control if i dont need the speed controlled? is it to save the battery? i have also been working on an electric golf cart and was thinking of removing the controller. is this possible? what exactly does the speed controller do?
thanks
Answer
The throttle is a speed controller. Most motors will work without them. It changes the voltage to the motor. You can leave it off if you securely duct tape yourself to the vehicle and have lots of insurance.
The throttle is a speed controller. Most motors will work without them. It changes the voltage to the motor. You can leave it off if you securely duct tape yourself to the vehicle and have lots of insurance.
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Title Post: How do you find what amp fuse to use for electric motor.?
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Rating: 83% based on 9498 ratings. 4 user reviews.
Author: Unknown
Thanks For Coming T0 My Blog
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