Sketch the Back EMF shape for each phase of a trapezoidal BLDC. Then sketch an example...
Sketch the Back EMF shape for each phase of a trapezoidal BLDC. Then sketch an example curve for the phase-to-phase voltage. The phase to phase voltage is what you measure between U and V, V and W etc.
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These are the actual measured voltages from my laboratory with a BLDC motor:
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Sketch the Back EMF shape for each phase of a trapezoidal BLDC.
Then sketch an example...
5.7. A DC machine has a back-emf constant of 0.24 V/(rad/s) and a resistance of 0.5...
5.7. A DC machine has a back-emf constant of 0.24 V/(rad/s) and a resistance of 0.5 ohms. It is operating from a 12V DC power supply. At its rated speed of 400 rpm, calculate its (a) rated back-emf voltage (that is, the back-emf at rated speed) (b)rated current (that is, the current at rated speed) (c) rated torque (d) rated output power POUT= To (e) rated output power POUT = EI (f) rated input power (g) rated efficiency-PouTlPi (h) rated...
Describe and explain what would happen to the shape growth curve (what phase, the slope, etc)...
Describe and explain what would happen to the shape growth curve (what phase, the slope, etc) of the culture if: The chemostat was placed at 27°C.
3. A controlled single-phase fiull-wave controlled rectifier is connected in a de motor drive in Figure...
3. A controlled single-phase fiull-wave controlled rectifier is connected in a de motor drive in Figure 4. The de motor armature inductance can be assumed large enough such that any motor curent ripple is negligible. (a) Assuming negligible supply reactance, show that the average rectifier output voltage V, in tems of the supply ms voltage E and the firing angle a, is given by 2/2E (6 marks) cos a _ (b) Given that the supply voltage is 230V, 50HZ and...
1. For example, the generator can produces a DC EMF (constant sign voltage). Explain how this differs...
1. For example, the generator can produces a DC EMF (constant sign voltage). Explain how this differs from the generator in the simulation. 2. What changes can you make in the simulation to maximize the voltage produced? 3. Describe the similarities and differences between a generator and a motor
could you please help me with this question? Thank you :) An ideal battery creates a...
could you please help me with this question? Thank you :)
An ideal battery creates a potential difference at the electrodes equal to its emf no matter what is attached. However, in reality, the electrochemical cells that creates the emf has its own internal resistance. In the circuit below the dashed box represents a real battery, and Ry is the internal resistance. It causes the battery output voltage (that you would measure between the top and bottom of the box)...
PLEAASEE HELP!! A battery with an emf of 12.0 V shows a terminal voltage of 11.6...
PLEAASEE HELP!! A battery with an emf of 12.0 V shows a terminal voltage of 11.6 V when operating in a circuit with two lightbulbs, each rated at 4.0 W (at 12.0 V),which are connected in parallel. What is the battery's internal resistance?
Question 3: DC motors can be simplistically modeled as shown in Figure 5 MoTor back emf Vi: +1 Re...
Question 3: DC motors can be simplistically modeled as shown in Figure 5 MoTor back emf Vi: +1 Resistor Ra Ia Figure 5: Simplified model of DC Motor (a) Write the three characteristic equations that determine the behavior of the DC motor. Denote torque constant and speed constant as Ka, K, respectively. (b) Motor parameters are the quantities that define the behavior of the motor. List the motor parameters from the described model. What are their units? (c) For given...
Problem 3: Given is the circuit displayed in the sketch which consists of three voltage sources...
Problem 3: Given is the circuit displayed in the sketch which consists of three voltage sources with emf and the four resistors with resistance R. What voltage Vo can be observed between the two V terminals? (20pts) Important hint: This is a really simple problem (very little algebra) when you try to solve it by inspection of the electric circuit and subsequent generation of one or several more simple equivalent circuits. VOIR
A resistor dissipates 1.80 W when the rms voltage of the emf is 12.0 V. Part...
A resistor dissipates 1.80 W when the rms voltage of the emf is 12.0 V. Part A ? At what rms voltage will the resistor dissipate 10.0 W Express your answer with the appropriate units. C: MÅ o 2 ? Vrms = 29.5 V Review your calculations and make sure you round to 3 significan No credit lost. Try again. Submit Previous Answers Request Answer
three phase electric sircuits problem
In the circuit in the picture, the loads (L) of the lights (lamps) are balanced. Each lamp (L) is set at 500 W and 120 V. Constant resistance (i.e. lamps) only draws the specified current. The three-phase motor is at 5 ?? and 0.8 reverse power factor. The secondary side of the transformer (bottom of the network) provides voltage between 208 V balanced phases (ll-line line). The motor is 1500 meters from the side (length from the secondary side). The...
5.7. A DC machine has a back-emf constant of 0.24 V/(rad/s) and a resistance of 0.5 ohms. It is operating from a 12V DC power supply. At its rated speed of 400 rpm, calculate its (a) rated back-emf voltage (that is, the back-emf at rated speed) (b)rated current (that is, the current at rated speed) (c) rated torque (d) rated output power POUT= To (e) rated output power POUT = EI (f) rated input power (g) rated efficiency-PouTlPi (h) rated...
3. A controlled single-phase fiull-wave controlled rectifier is connected in a de motor drive in Figure 4. The de motor armature inductance can be assumed large enough such that any motor curent ripple is negligible. (a) Assuming negligible supply reactance, show that the average rectifier output voltage V, in tems of the supply ms voltage E and the firing angle a, is given by 2/2E (6 marks) cos a _ (b) Given that the supply voltage is 230V, 50HZ and...
could you please help me with this question? Thank you :)
An ideal battery creates a potential difference at the electrodes equal to its emf no matter what is attached. However, in reality, the electrochemical cells that creates the emf has its own internal resistance. In the circuit below the dashed box represents a real battery, and Ry is the internal resistance. It causes the battery output voltage (that you would measure between the top and bottom of the box)...
Question 3: DC motors can be simplistically modeled as shown in Figure 5 MoTor back emf Vi: +1 Resistor Ra Ia Figure 5: Simplified model of DC Motor (a) Write the three characteristic equations that determine the behavior of the DC motor. Denote torque constant and speed constant as Ka, K, respectively. (b) Motor parameters are the quantities that define the behavior of the motor. List the motor parameters from the described model. What are their units? (c) For given...
Problem 3: Given is the circuit displayed in the sketch which consists of three voltage sources with emf and the four resistors with resistance R. What voltage Vo can be observed between the two V terminals? (20pts) Important hint: This is a really simple problem (very little algebra) when you try to solve it by inspection of the electric circuit and subsequent generation of one or several more simple equivalent circuits. VOIR
A resistor dissipates 1.80 W when the rms voltage of the emf is 12.0 V. Part A ? At what rms voltage will the resistor dissipate 10.0 W Express your answer with the appropriate units. C: MÅ o 2 ? Vrms = 29.5 V Review your calculations and make sure you round to 3 significan No credit lost. Try again. Submit Previous Answers Request Answer
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