AN0899 brushless DC motor control using PIC18FXX31 MCUs

... OffsetRead ? Yes Start ADC No Change ADC input to Motor Terminal A Is ADC Done? No Yes ADCOffset = ADC Result Invert msb of ADC Offset State = OffsetRead PWMThreshold = ADCRPM + ADCOffset Limit PWMThreshold ... ADCON1 ; ADC left justified, AN0 only banksel ADCON0 ; setup ADC (bank0) movlw B’11000001’ movwf ADCON0 bsf clrf call clrf ADCON0,GO LastSensor Commutate ADC ; ADC clock from int RC,...

Ngày tải lên: 30/03/2014, 07:20

... electromagnetictorque when just torque iS controlled _ without flux control under 1.2 N m load with non- ideal trapezoidal back- EMF ,1 (reference torque is 1.225 N m) (a) the back- EMF is not ideally ... the control of a nonsinusoidal brushless dc motor, " in Proc IFEE-JECON Annu Meeting, Orlando, FL, Nov 610, 1995, vol 2, pp 836-843 [9] M Ehsani, R C Becerra, "High-s...

Ngày tải lên: 03/01/2014, 19:44

... therefore in this paper a new transformation which preserves the same advantages as the Park transformation A Mathematical Model of the BDCM We suppose that the motor has the following typical features ... pulsating torque (the homopolar part) and a two-phase motor with a rotating field (the "ap" The classical Park transformation is, in fact, the succ...

Ngày tải lên: 03/01/2014, 19:44

... torque control of brushless DC motor based on back- EMF vector’ , ELECTROMOTION pp 128-138, 2009 [7] S B Ozturk and H A Toliyat, “Sensorless Direct Torque and Indirect Flux Control of Brushless DC Motor ... control of brushless dc motor with non- sinusoidal back- EMF, ” in Proc IEEE-IEMDC Biennial Meeting, Antalya, Turkey, May 3-5, 2007 [6...

Ngày tải lên: 03/01/2014, 19:45

... maximum torque As a result, in this study, stator flux linkage amplitude is OZTURK AND TOLIYAT: DIRECT TORQUE AND INDIRECT FLUX CONTROL OF BRUSHLESS DC MOTOR TABLE I SWITCHING TABLE FOR DTC OF BLDC MOTOR ... well OZTURK AND TOLIYAT: DIRECT TORQUE AND INDIRECT FLUX CONTROL OF BRUSHLESS DC MOTOR Fig Steady state and transient behavior of the...

Ngày tải lên: 03/01/2014, 19:46

... 1709 Salih Baris Ozturk and Hamid A Toliyat, Direct torque control of brushless dc motor with non- sinusoidal back- EMF, ” in Proc IEEE-IEMDC Biennial Meeting, Antalya, Turkey, May 3-5, 2007, vol ... the control of a nonsinusoidal brushless dc motor, ” in Proc IEEE-IECON Annu Meeting, Orlando, FL, Nov 6-10, 1995, vol 2, pp 836–843 Y Liu, Z Q Zhu, and D Howe, Direc...

Ngày tải lên: 03/01/2014, 19:46

... improve the performance of the Brushless DC Motor drives The vector- control principle in dq synchronously rotating frame is utilized for the generation of current references only, and the motor currents ... proposed Pseudo- vector Control for BLDCM drives III PRINCIPLE OF PSEUDO- VECTOR CONTROL In the conventional square-wave phase current control (Fig 2), for...

Ngày tải lên: 03/01/2014, 19:46

... Motor control questions Why we need speed control? How is DC motor speed controlled? How is motor direction controlled? What circuits can be used? Reasons for accurate speed control Motor ... 74HC86 Motor control diagram PROCESSOR H-BRIDGE CIRCUIT DC MOTOR ENCODER Control systems What is a control system? What are some examples? What are the types of control sys...

Ngày tải lên: 22/05/2014, 18:05

... rated torque Tr = 30 N.m DC Motor With Bipolar PWM Excitation DC Motor Model Simulation Results Voltage Average Applied To Motor MOTOR SPEED (rad/s) Motor Current (A) DC Motor with unipolar PWM ... single winding with dc motors, and are the phase values for a BLDC motor Brushless dc motors (BLDC) are usually phase synchronous motors used in a configuration to be treated...

Ngày tải lên: 09/07/2014, 20:20

... 89C51 microcontroller is programmed using Atmel’s Flash programmer One-step rotation of the stepper motor used in this project equals 1.8o When you program the motor for 200 steps, the motor ... for different versions of microcontrollers are given in Table I Driver circuit design The microcontroller outputs a current of 1.7 mA To drive the coil of a stepper motor requiring a...

Ngày tải lên: 28/12/2015, 19:10

... to characterize the material Another type of material that is characterized by a broad hysteresis loop is called hard magnetic material 1.3.1 Hard magnetic materials (Permanent magnets) Permanent ... commutator motor: The construction of a permanent magnet DC motor( PMDC) is similar to a DC conventional motor with the electromagnetic excitation system replaced by per...

Ngày tải lên: 16/09/2015, 12:26

... Hydro-Québec, Natural Resources Canada and the Natural Sciences and Engineering Research Council of Canada VII [1] REFERENCES C.L Kana; M Thamodharan and A Wolf; “System management of a wind- energy converter , ... a buck boost converter inserted between the rectifier output and the DC bus The control relationship between generator speed and the DC bus voltage is...

Ngày tải lên: 03/01/2014, 19:15

... the DSP controller together with the inner loop controller Both the sinusoidal current control and the instantaneous torque control are tested with the speed controller The time response of the ... simulated torque from the motor model is used as the feedback torque signal, i.e the feedback is ideal Therefore, the simulated performance of the controller...

Ngày tải lên: 03/01/2014, 19:52

... assumptions made for the DC motor model, as the analog tachometer is a DC generator - a DC motor in reverse Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System Kevin Craig 16 Mathematical ... The motor used in this system is the Honeywell 22VM51-020-5 DC Motor with Tachometer The factory specifications are shown in Table Mechatronics...

Ngày tải lên: 25/01/2014, 13:20

... a =Equivalent motor resistance; DC Motor Position and Speed Tracking (PAST) System Using Neural Networks 29 Chapter 3: Position and Speed Tracking (PAST) System La =Equivalent motor inductance; ... Profile Using PAST System 122 DC motor Position and Speed Tracking( PAST) System Using Neural Networks xiv List of Figures Figure 5....

Ngày tải lên: 04/10/2015, 10:25