The gain K appears in DC motor emf equation as E = K and in torque equation as T = KI where is the speed of rotation in rad/s and I is the armature current.
The gain K = P_{}Z/2a where P is the number of poles, Z is the number of armature conductors, _{ } is the flux per pole and a is the number of parallel paths. So clearly K does not depend on armature resistance R or inductance L and is not affected by them. Changing R and L will change other motor parameters but not K.
The unit of K is Volt-sec/radian or Newton-metre/Ampere. Both are dimensionally equivalent.
Tau or = L/R is the electrical time constant of the motor and it depends on armature resistance and inductance.
in a DC motor why and how the gain K is affected by the amaurtue resistant...
2. Why it is dangerous to supply power to an unloaded series connected DC motor? Puerto Rico Polytechnic University Department of Electrical Engineering Electromechanical Energy Conversion Systems I Laboratory 89 3. How can you reverse the direction of rotation of a shunt DC motor? 4. Name and explain two methods to control the speed of a DC motor.
Laplace Analysis of the Permanent Magnet Brushed DC Motor and the right final answer should be like this A permanent magnet brushed DC motor (the type of motor that spins when connected to a constant voltage) can be described by the simplified model tö+) = Kv, where o is the angle of the motor shaft, v is the voltage applied to the motor, 7 is a positive constant known as the motor time constant, and K is a positive constant...
How is the voltage gain affected by modifying the load resistance in a Common Emitter and why? Vcc=12V 1k C3 Vout Q11 1uF Q2N3904 RE1 S 1001 Vs 500mVpp R2 10K 4.7k RE2 330 C2 I 1.0KHz 470F
please write clear please steps Question Figure 1 shows a DC motor with Ra = 20, Jm 4kg - m2, Dm 12kg- mm2/s, K 25mV-sec, K 7N-mm/A, and Km 0 Fixed field Ra w 0000 Rotor Armature ea T() circuit Figure 1: DC motor a) Find the transfer function, G(s) ( for L 10mH and find the pole(s) and Zero(s) of the system. b) Find the transfer function, G(s) ( for La OmH and find the pole(s) and Zero(s) of...
I can not seem to get the right answers. Thank you! Given a 1/4 hp, separately excited, dc motor with the following parameters: K = 0.61, R, 15Ω, La-120mb. J = 0.005, and b = 0.0006. The armature voltage is controlled by a 120-V dc PWM source operating at 100 Hz 1. What is the armature current if the no-load speed is 1800 rpm when the armature supply is operated at a 100% duty cycle? 2. What is the no-load...
OUESTION 1 Anna is designing an audio amplifier for her headphones. She wants to calculate the real DC gain of the amplifier before putting music through it to make sure it won't destroy her headphones. She has setup a test circuit of the non-inverting amplifier shown below. She has used a cheap poor quality op-amp where the input resistance is 1 kQ, the output resistance is 4 Q and the open loop gain is 100xvin 2Q2 ww 4 2 V...
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