A Motor Designer Looks at Positive Temperature - Purdue e-Pubs
... low cost capacitor. As in the case of the induction run motor, the watts consumed in keeping the PTCR switched off during running must be included in sy~tem efficiency calculations, and depend on both PTCR and environment. ...
... low cost capacitor. As in the case of the induction run motor, the watts consumed in keeping the PTCR switched off during running must be included in sy~tem efficiency calculations, and depend on both PTCR and environment. ...
Power - Green Tricycle
... ◦ Charge Controller - provides suitable charging capabilities for the battery ...
... ◦ Charge Controller - provides suitable charging capabilities for the battery ...
Selection and Modeling of PMBLDC Motor for Torque Ripple
... THE brushless dc motor (BLDCM) has trapezoidal electromotive force (EMF) and quasi-rectangular current waveforms. BLDC Motor is a type of Synchronous Motor. This means magnetic field generated by the stator and magnetic field generated by the rotor rotates at the same frequency. DC motor also known ...
... THE brushless dc motor (BLDCM) has trapezoidal electromotive force (EMF) and quasi-rectangular current waveforms. BLDC Motor is a type of Synchronous Motor. This means magnetic field generated by the stator and magnetic field generated by the rotor rotates at the same frequency. DC motor also known ...
OPTIMAL EFFICIENCY BASED PREDICTIVE CONTROL OF
... In addition to its advantages, such as speed capability, robustness, cheapness and ease of maintenance, when used with a field oriented control scheme, the induction machine is the most widely used electrical machines. The usually used direct field oriented control methods keeps rotor flux at consta ...
... In addition to its advantages, such as speed capability, robustness, cheapness and ease of maintenance, when used with a field oriented control scheme, the induction machine is the most widely used electrical machines. The usually used direct field oriented control methods keeps rotor flux at consta ...
Inductance, capacitance and resistance
... Some units incorporate the use of magnetic brakes and clutches. • This allows for a greater control during either starting or stopping the unit. • Can be used to prevent undue binding on the mechanical linkage connected to the motor or may disengage the motor when not needed as in the case of the be ...
... Some units incorporate the use of magnetic brakes and clutches. • This allows for a greater control during either starting or stopping the unit. • Can be used to prevent undue binding on the mechanical linkage connected to the motor or may disengage the motor when not needed as in the case of the be ...
Q04404105111
... with low harmonics without the use of transformers or series-connected synchronized switching devices, for high-voltage, high power applications. The general structure of the multilevel converter, which has a multiple of the usual six switches found in a three-phase inverter, is to synthesize a sinu ...
... with low harmonics without the use of transformers or series-connected synchronized switching devices, for high-voltage, high power applications. The general structure of the multilevel converter, which has a multiple of the usual six switches found in a three-phase inverter, is to synthesize a sinu ...
Identifying Motor Defects Through Fault Zone Analysis
... A turn to turn or a phase to phase short can occur many times without resulting in an immediate ground fault. Because of this, testing with just a megger for preventive maintenance or following a motor trip may not identify the fault. This could cause a small winding fault to develop into a major c ...
... A turn to turn or a phase to phase short can occur many times without resulting in an immediate ground fault. Because of this, testing with just a megger for preventive maintenance or following a motor trip may not identify the fault. This could cause a small winding fault to develop into a major c ...
Series A dV/dt Filters
... PRODUCT SELECTION: See MTE dV/dt Filter Selection Brochure or visit the MTE website at www.mtecorp.com for complete product selection. Please note that Series A dV/dt Filters can only be used with PWM inverters with switching frequencies between 900Hz and 8kHz. BASIC SPECIFICATION RANGES - The dV/dt ...
... PRODUCT SELECTION: See MTE dV/dt Filter Selection Brochure or visit the MTE website at www.mtecorp.com for complete product selection. Please note that Series A dV/dt Filters can only be used with PWM inverters with switching frequencies between 900Hz and 8kHz. BASIC SPECIFICATION RANGES - The dV/dt ...
Engineering Letters
... By replacing the fuel tank with a high energy density battery and the internal combustion engine with an efficient electric motor, EVs are capable of achieving significant efficiency improvements and emission reductions. Their range, efficiency, cost and torque-speed characteristics are predominantl ...
... By replacing the fuel tank with a high energy density battery and the internal combustion engine with an efficient electric motor, EVs are capable of achieving significant efficiency improvements and emission reductions. Their range, efficiency, cost and torque-speed characteristics are predominantl ...
Theoretical developments
... Other methods based on inductance variation have been researched, but they all present some drawbacks in actual implementation This paper uses finite-element analysis to calculate the inductance of a BLDC motor and develops an initial rotor position detection and start-up algorithm, utilising th ...
... Other methods based on inductance variation have been researched, but they all present some drawbacks in actual implementation This paper uses finite-element analysis to calculate the inductance of a BLDC motor and develops an initial rotor position detection and start-up algorithm, utilising th ...
SIMULATION OF ELECTRIC MACHINE AND
... Conventions & formulations: Because the emphasis in this work is focused on drives, the so-called motor conventions are adopted through out. This means that electric power in and mechanical power out are considered positive for motoring action. Furthermore, the currents are assumed to be positive w ...
... Conventions & formulations: Because the emphasis in this work is focused on drives, the so-called motor conventions are adopted through out. This means that electric power in and mechanical power out are considered positive for motoring action. Furthermore, the currents are assumed to be positive w ...
motorintro - Cleveland State University
... 2a, with its south pole pointing in the north direction of the stator's magnetic field. Now suppose we remove current from winding 1 and instead apply current to winding 2 in the direction shown in Figure 2b. The stator's magnetic field will point to the left, and the rotor will rotate such that its ...
... 2a, with its south pole pointing in the north direction of the stator's magnetic field. Now suppose we remove current from winding 1 and instead apply current to winding 2 in the direction shown in Figure 2b. The stator's magnetic field will point to the left, and the rotor will rotate such that its ...
Annotated - Electrical and Computer Engineering
... • Magnets can become demagnetized by overheating or because of excessive armature currents. • The flux density magnitude is smaller than in wound- field machines. Consequently, the torque produced per ampere of armature current is smaller in PM motors than in wound- field motors with equal power rat ...
... • Magnets can become demagnetized by overheating or because of excessive armature currents. • The flux density magnitude is smaller than in wound- field machines. Consequently, the torque produced per ampere of armature current is smaller in PM motors than in wound- field motors with equal power rat ...
Electric motor
An electric motor is an electrical machine that converts electrical energy into mechanical energy. The reverse of this would be the conversion of mechanical energy into electrical energy and is done by an electric generator.In normal motoring mode, most electric motors operate through the interaction between an electric motor's magnetic field and winding currents to generate force within the motor. In certain applications, such as in the transportation industry with traction motors, electric motors can operate in both motoring and generating or braking modes to also produce electrical energy from mechanical energy.Found in applications as diverse as industrial fans, blowers and pumps, machine tools, household appliances, power tools, and disk drives, electric motors can be powered by direct current (DC) sources, such as from batteries, motor vehicles or rectifiers, or by alternating current (AC) sources, such as from the power grid, inverters or generators. Small motors may be found in electric watches. General-purpose motors with highly standardized dimensions and characteristics provide convenient mechanical power for industrial use. The largest of electric motors are used for ship propulsion, pipeline compression and pumped-storage applications with ratings reaching 100 megawatts. Electric motors may be classified by electric power source type, internal construction, application, type of motion output, and so on.Electric motors are used to produce linear or rotary force (torque), and should be distinguished from devices such as magnetic solenoids and loudspeakers that convert electricity into motion but do not generate usable mechanical powers, which are respectively referred to as actuators and transducers.