An Electric Vehicle (EV) is run by a DC series motor. The motor is fed from...
An Electric Vehicle (EV) is run by a DC series motor. The motor is fed from onboard battery bank through a PWM speed controller.
- Derive the equation for starting torque, starting current and steady state current of the motor.
- Plot Torque vs Speed characteristics of the motor under voltage control.
- Design a buck converter for PWM speed control operation of the motor.
- Plot the input voltage, output voltage, input current, output current and switching pulses of the converter considering Continuous Current Mode (CCM) operation.
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An Electric Vehicle (EV) is run by a DC series motor. The motor
is fed from...
A separately excited DC motor is fed from a variable DC source and it drives a...
A separately excited DC motor is fed from a variable DC source and it drives a variable mechanical load as shown in Figure Q4b. The excitation current If is held constant during the motor operation. (i) How can the motor direction be reversed? (4 marks) (ii) Explain what will happen to the current Ia, the internal voltage Eg, and speed if the mechanical torque increases whilst the DC input voltage VT is held constant. (4 marks) (iii)Explain what will happen...
Book name # fundamental of electric machines A brushless DC electric motor (BLDC motor or BL...
Book name # fundamental of electric
machines
A brushless DC electric motor (BLDC motor or BL motor), also known as electronically commutated motor (ECM or EC motor) and synchronous DC motors, are synchronous motors powered by direct current (DC) electricity via an inverter or switching power supply which produces electricity in the form of alternating current (AC) to drive each phase of the motor via a closed loop controller. The controller provides pulses of current to the motor windings that...
answere Please mark only one of the four choices Q1. Controlling the speed of a DC motor by using a micro-controller, is what type of control? b. Digital C. Analog d. All of the above Q2. When cur...
answere
Please mark only one of the four choices Q1. Controlling the speed of a DC motor by using a micro-controller, is what type of control? b. Digital C. Analog d. All of the above Q2. When current flow is interrupted in a DC motor, which motor property causes a reverse voltage spike? a. Resistance b. Capacitance C. Inductance d. None of the above Q3. Which Arduino internal circuit is used to control motor speed? a. Digital to Analog Converter...
Is N N Vo V's Vo Vs LOAD LOAD Figure 1 It has been shown in...
Is N N Vo V's Vo Vs LOAD LOAD Figure 1 It has been shown in lectures that from the equality of power generation and power consumption, and as far as the average input/output voltages and currents are concerned, the buck and boost converters' operation in CCM (continuous current mode) are similar to the operation of the ideal AC transformers. So these converters may be considered as "ideal DC transformers". A buck converter operates with a duty cycle D 0.4,...
Buck Converter Question Q3. A Buck converter is used to produce a regulated 10V, 5A DC...
Buck Converter Question
Q3. A Buck converter is used to produce a regulated 10V, 5A DC power supply from a variable DC source with an nominal input voltage of Vin = 20V±5V. The Buck converter switches at 250kHz, and operates entirely in the continuous conduction mode. The output filter capacitance is C1.0uF 3.a. Draw the circuit topology for the Buck converter. Ensure that your circuit includes the input DC source, the output load resistance, the switching devices (i.e. MOSFET and...
Given a 1/4 hp, separately excited, dc motor with the following parameters: K = 0.61, R, 15Ω, La-...
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...
A separately excited dc motor is fed by a 3-phase, 6-pulse converter shown in figure Q5. The 3-phase line is a 500 V, 6...
A separately excited dc motor is fed by a 3-phase, 6-pulse converter shown in figure Q5. The 3-phase line is a 500 V, 60 Hz supply. At rated condition, the dc motor armature current is 15 A. The dc motor armature resistance is 0.15 Ω and the rated speed is 1700 rpm. If the delay angle of the converter is 36 °, calculate the following: 3-phase (2 0 line Figure Q5. (2 marks) Rated voltage of the motor a. b....
Fundamental of power electronics: In a certain application, an unregulated dc input voltage can vary between...
Fundamental of power electronics: In a certain application, an unregulated dc input voltage can vary between 18 and 36 V. It is desired to produce a regulated output of 28 V to supply a 2 A load. control circuit automatically adjust D to maintain the constant output voltage and current. All ideal components. Hence, a converter is needed that is capable of both increasing and decreasing the voltage. Since the input and output voltages are both positive, converters that invert the...
8) A three-phase thyristor controlled converter is used to drive a motor system. What is the...
8) A three-phase thyristor controlled converter is used to drive a motor system. What is the required trigger delay angle a if the required average output DC voltage is 0.5Vm [2 points) a) 90 degrees. b) 45 degrees. c) 58.43 degrees. d) O degrees. 9) A 3-point motor starter arrangement is shown in the diagram below (1 point). Starting Resistence No volt col OFF Soft ron piece Starter handie Spring Over load release Lever Trangular iron Three Point Starter As...
Analyze a DC series phase-controlled motor drive with single-phase, full wave, controlled AC/DC rectifier in continuous...
Analyze a DC series phase-controlled motor drive with single-phase, full wave, controlled AC/DC rectifier in continuous conduction mode (CCM) of operation. Draw the motor voltage and current waveforms and write the equations (instantaneous and averaged). Please note that the waveforms and equations have been presented in class for a DC separately-excited motor drive.
Book name # fundamental of electric
machines
A brushless DC electric motor (BLDC motor or BL motor), also known as electronically commutated motor (ECM or EC motor) and synchronous DC motors, are synchronous motors powered by direct current (DC) electricity via an inverter or switching power supply which produces electricity in the form of alternating current (AC) to drive each phase of the motor via a closed loop controller. The controller provides pulses of current to the motor windings that...
answere
Please mark only one of the four choices Q1. Controlling the speed of a DC motor by using a micro-controller, is what type of control? b. Digital C. Analog d. All of the above Q2. When current flow is interrupted in a DC motor, which motor property causes a reverse voltage spike? a. Resistance b. Capacitance C. Inductance d. None of the above Q3. Which Arduino internal circuit is used to control motor speed? a. Digital to Analog Converter...
Is N N Vo V's Vo Vs LOAD LOAD Figure 1 It has been shown in lectures that from the equality of power generation and power consumption, and as far as the average input/output voltages and currents are concerned, the buck and boost converters' operation in CCM (continuous current mode) are similar to the operation of the ideal AC transformers. So these converters may be considered as "ideal DC transformers". A buck converter operates with a duty cycle D 0.4,...
Buck Converter Question
Q3. A Buck converter is used to produce a regulated 10V, 5A DC power supply from a variable DC source with an nominal input voltage of Vin = 20V±5V. The Buck converter switches at 250kHz, and operates entirely in the continuous conduction mode. The output filter capacitance is C1.0uF 3.a. Draw the circuit topology for the Buck converter. Ensure that your circuit includes the input DC source, the output load resistance, the switching devices (i.e. MOSFET and...
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...
A separately excited dc motor is fed by a 3-phase, 6-pulse converter shown in figure Q5. The 3-phase line is a 500 V, 60 Hz supply. At rated condition, the dc motor armature current is 15 A. The dc motor armature resistance is 0.15 Ω and the rated speed is 1700 rpm. If the delay angle of the converter is 36 °, calculate the following: 3-phase (2 0 line Figure Q5. (2 marks) Rated voltage of the motor a. b....
8) A three-phase thyristor controlled converter is used to drive a motor system. What is the required trigger delay angle a if the required average output DC voltage is 0.5Vm [2 points) a) 90 degrees. b) 45 degrees. c) 58.43 degrees. d) O degrees. 9) A 3-point motor starter arrangement is shown in the diagram below (1 point). Starting Resistence No volt col OFF Soft ron piece Starter handie Spring Over load release Lever Trangular iron Three Point Starter As...
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