AN0893 low cost bidirectional brushed DC motor control using the PIC16F684

... Figure 5, CWDC motors employ both a series and a shunt field The performance of a CWDC motor is a combination of SWDC and SHWDC motors CWDC motors have higher torque than a SHWDC motor while ... to SWDC motors is that they not have precise speed control like PMDC and SHWDC motors have FIGURE 4: DC Voltage Supply SERIES-WOUND DC MOTORS Series Field Armature Brush PERMANENT MAGNET DC...

Ngày tải lên: 22/12/2013, 14:15

... 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

... 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

... only in sleep By extension, even in individuals with structural narrowing of the upper airway, OSA is ultimately caused by the impact of brain sleep mechanisms on the processes that control motor ... potential interactions between neuronal groups that are involved in sleep /awake regulation and motor neurone activity Evidence for and against the involve...

Ngày tải lên: 12/08/2014, 18:20

... 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

... of the model with some laws of physics OBJECTIVE AND CONTENTS OF THE BOOK Relationship between the model parameters and the hysteresis loop Identification of the model parameters Control of systems ... parameter ¯ values = and n = with the Figure 4.8 Variation of x with the parameter ¯ values = and n = with the 81 83 Figure 4.9 Variation of x with...

Ngày tải lên: 12/12/2013, 22:41

... 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

... 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

... Miniature UAV helicopter also has special attractiveness to the academic circle because of their smaller size, expendable lower cost, outstanding maneuverability, ease of uses, and wide range of capabilities ... name a few However, due to the highly dynamic behavior of helicopter, limited payload capability and lack of highly accurate sensors, miniature UAVs are stil...

Ngày tải lên: 11/09/2015, 09:59