The speed of a BLDC motor can be controlled by __________(a) Changing input DC voltage(b) Changing temperature(c) Changing wind direction(d) Cannot be controlledI got this question in an international level competition.My question is from Solid State Controlled Drives in chapter Introduction to Solid State Controlled Drives of Electric Drives

The speed of a BLDC motor can be controlled by __________(a) Changing

1.	The speed of a BLDC motor can be controlled by __________(a) Changing input DC voltage(b) Changing temperature(c) Changing wind direction(d) Cannot be controlledI got this question in an international level competition.My question is from Solid State Controlled Drives in chapter Introduction to Solid State Controlled Drives of Electric Drives
Answer» The CORRECT ANSWER is (a) Changing input DC VOLTAGE To elaborate: The speed of a BLDC motor can be controlled by changing the input DC voltage or the current using PWM. It can be achievable by using a transistor and chopper.

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