single phase ac motor driver circuit

... wire This creates an inductive reactance causing the current to lag Split Phase Motor  A split phase motor has windings:   Run winding Start winding Split Phase Motor    The two windings cause ... machines Capacitor Start Motor    Similar in effect to the split phase motor Capacitor causes current in start winding to lead voltage Start and Run windings are approximately 90° out of phase ... 90° out of phase Capacitor Start Motor   High torque Used in compressors, refrigerators and when high torque starting is needed Capacitor Start – Capacitor Run Motor   capacitors are connected...

Ngày tải lên: 27/06/2014, 19:20

... supply: AC- DC rectifier, AC- AC converter, DC -AC inverter and DC-DC converter An DC -AC power converter transforms a DC input voltage to a desired magnitude and frequency AC output voltage The AC power ... frequency harmonics in AC output voltage The inverter could provide a single- phase or a three -phase electrical power according to the load requirements Rotary UPS systems use motors and generators ... controller for minimizing the tracking error of the output voltage in single- phase DC -AC inverters Repetitive control is a control scheme applied to plants that must track a periodic trajectory or...

Ngày tải lên: 03/10/2015, 21:56

... induction motor An induction motor is an asynchronous AC (alternating current) motor The least expensive and most widely used induction motor is the squirrel cage motor The major reason why these machines ... battery packs, 12VDC to 140VDC ~40 VDC is the most compatible voltage supply for the motor controller that will be used for this thesis • Induction motor Three -phase, 0.5kW, 4-pole machine This ... work 2.2 Induction Motor Theory and Practice Wildi [1] is an excellent source of information on the theory behind the operation of an induction motor The three -phase induction machine is presented...

Ngày tải lên: 27/10/2013, 23:15

... Dittrich Vector Control of Three -Phase AC Machines Nguyen Phung Quang · Jörg-Andreas Dittrich Vector Control of Three -Phase AC Machines System Development in the Practice With 230 Figures Prof Dr ... structures for systems using three -phase AC machines From the principles of electrical engineering it is known that the 3 -phase quantities of the 3 -phase AC machines can be summarized to complex ... control for three -phase AC drives actual internal dq current components are dynamically coupled with each other From the control point of view, the control object „3 -phase AC machine“ is an object...

Ngày tải lên: 18/12/2013, 09:10

... Spring 2007 [7] P K Jain, J R Espinoza, and H Jin, “Performance of a single- stage UPS system for single- phase trapezoidal-shaped AC- voltage supplies,” IEEE Trans Power Electron., vol 13, no 5, pp ... capability to maintain the desired ac output voltage at 50% voltage sag of the battery bank with high efficiency, low harmonics, fast response, ZHOU et al.: SINGLE- PHASE UNINTERRUPTIBLE POWER SUPPLY ... under heavy load, the capacitor voltage of the Z-source inverter drops significantly as well; thus, the voltage difference between the reference u∗ and the actual C capacitor voltage uC is sent...

Ngày tải lên: 03/01/2014, 19:12

... the factor k Actually, such a factor allows the charge/discharge speed to be controlled A fast dynamic can be generally obtained choosing kS1 in order to deliver the energy needed to the capacitor ... tracked since the chargeldischarge process would be slow anyway due to the small power factor A faster chargeldischarge process can be achieved with lower CONTROL currents and unity power factor ... Three -phase Power Converters”, IEEE Trans on Power Electronics, vol 13, NO 3, May 1998 pp419-426 M.-T Tsai, W I Tsai: “Analysis and design of Three -phase AC- to-DC Converters With High Power Factor...

Ngày tải lên: 03/01/2014, 19:44

... single- phase induction motor Figure 9.8-5 Free-acceleration characteristics of a capacitor-start single- phase induction motor 368 UNBALANCED OPERATION AND SINGLE- PHASE INDUCTION MACHINES Figure 9.8-6 ... in Reference 9.8 SINGLE- PHASE INDUCTION MACHINES The single- phase induction machine is used widely in household applications: refrigerator, washing machine, clothes dryer, furnace fan, garbage ... of a twophase induction machine to be out of phase To accomplish this the impedances of the stator windings are made unequal For example, the split -phase machine is a two -phase induction motor...

Ngày tải lên: 16/02/2014, 18:48

... ⎪2 ⎪ π E single- phase rectifier ⎩ ⎧3 ⎪ π ω eu Lc ⎪ rr = ⎨ ⎪ ω eu Lc ⎪ ⎩π ⎧2 Lc lr = ⎨ ⎩ Lc (14.4-2) three -phase rectifier (14.4-3) single- phase rectifier e three -phase rectifier single- phase rectifier ... back emf waveforms Machines with sinusoidal back emfs may be controlled so as to achieve nearly constant torque; however, machines with a nonsinusoidal back emf may be less expensive to manufacture ... particular, eventually, the back emf of the machine will rise to the point where the inverter cannot achieve the current command due to the fact that the back emf of the machine becomes too large...

Ngày tải lên: 16/02/2014, 18:54

... the output voltage harmonic in a single phase fully controlled bridge converter is _ the input supply frequency v) The input displacement factor of a single phase fully controlled bridge converter ... of 50 mH The motor is supplied from a single phase fully controlled converter operating from a 230 V, 50 Hz, single phase supply with a firing angle of α = 30° At what speed the motor will supply ... the circuit diagram of a single phase fully controlled bridge converter It is one of the most popular converter circuits and is widely used in the speed control of separately excited dc machines...

Ngày tải lên: 14/05/2014, 22:32

... power electronic devices used in the rectifier circuit Reaction of the rectifier circuit upon the ac network, reactive power requirement, power factor, harmonics etc Rectifier control aspects ... becomes poorer In both single phase half wave and full wave rectifiers the form factor of the output voltage approaches _ with capacitive loads provided the capacitance is enough The ... 9.4.2 Single phase uncontrolled full bridge rectifier Version EE IIT, Kharagpur 21 The split supply full wave single phase rectifier offers as good performance as possible from a single phase...

Ngày tải lên: 14/05/2014, 22:33

... [4] Lászó Huber and Dusan Borojevic, “Space vector modulated three -phase to three -phase matrix converter with input power factor correction” IEEE Transactions On Industrial Applications, Vol.31, ... chu kỳ sau: ccc → acc → aca → aaa → aba → abb → bbb Tương ứng với khóa chuyển mạch sau: Hình 7: Các khối mô matlab Hình 6: Sơ đồ chuyển mạch khóa chu kỳ Ts Ghi :Ký hiệu SAc nghĩa pha A tải ... eliminates reactive elements,” Proceedings of Powercon 7, San Diego,CA, 1980, pp E3-1-E3-15 [2] A Alesina, M Venturini, “Analysis and Design of OptimumAmplitude Nine-Switch Direct AC- AC Converters”,...

Ngày tải lên: 14/05/2014, 22:37

... Start of thinner size is placed 90˚ apart • Run has relative Large number of turns • Aux has relative Small number of turns Φm Starting Torque in Single phase motor Split Phase Principle • To produce ... including the Aux winding • When an AC source is applied the main windg produce a flux Φ m while the Aux wndg produces a flux Φa Since the angles are out of phase a resultant rotating field is...

Ngày tải lên: 27/06/2014, 19:20

... interlocks delta contactor K3M, and the NO contact of K1M in current path energises mains contactor K1M contactor K2M holds itself in via NO contact K2M in current path Motor M1M runs in star ... chạy qua main contactor, theo sau star contactor, thường Switching on: Khi nhấn ON Pressing pushbutton S1Q energises star contactor K1M and time relay K1T The NC contact of contact K1M in current ... circuit above, the star contactor is energised first, then the mains contactor Circuits in which the mains contactor is energised first, followed by the star contactor, are also common Hệ thống...

Ngày tải lên: 03/07/2014, 07:20

... of safety connection plugs 19/4 mm with tap (5 each) each each each each each each each each each each 15 x 5x EEM41 Three -phase asynchronous machines Safety Basic safety instructions In all ... Three -phase asynchronous machines Asynchronous motor Circuit diagram "Load characteristics" (star-delta switch) 24 EEM41 Three -phase asynchronous machines Asynchronous motor Set-up "Load characteristics" ... variables Uphase and Iphase to be? Uphase= V Iphase= A Circuit diagram "Connection & starting" (star and delta switch) 13 EEM41 Three -phase asynchronous machines Asynchronous motor Set-up...

Ngày tải lên: 13/07/2014, 00:20

... obtain more accurate results of the above equations, we divide the pipeline to a number of sections (ΔL), so that we can calculate the pressure drop (Δp) and value p at each point more accurately ... that: - None of those calculations gives the same result as practical data, but the result is acceptable when we combine all the one -phase flow equations of Weymouth, Panhandle A, Panhandle B and ... associated gas pipeline is constructed in Matlab environment, the software interface is introduced in Fig Figure Interface of pressure drop calculation in Matlab Environment • Result with data in...

Ngày tải lên: 22/07/2014, 10:21

... Theory In AC machines, windings are distributed in such a way that a rotating magnetic field is generated by a polyphase AC source An ideal three -phase voltage source consists of three AC voltage ... Preface The importance of motor control technology has resurfaced recently, since motor efficiency is closely linked to the reduction of greenhouse gases Thus, the trend is to use high-efficiency motors ... for a graduate level course on AC motor control and electric vehicle propulsion Not only motor control, but also some motor design perspectives are covered, such as back EMF harmonics, loss, flux...

Ngày tải lên: 24/07/2015, 13:53

... named “the two -phase spindle motor are the phase voltages offered by the block named “two -phase motor driver And when the motor operates in BLDC mode, the motor speed and the phase back-EMF can ... voltage of one phase 55 Figure 2.33 The phase voltages of two phases 56 Figure 2.34 The phase voltages and currents of one phase 57 Figure 2.35 The phase back-EMF of each phase ... two -phase spindle motor is fed back to the two -phase motor driver for close-loop control and sensorless control The block named “the two -phase spindle motor describes the equations of two-phase...

Ngày tải lên: 28/09/2015, 13:38