dc motor speed control circuit with pic

... dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In -Circuit Serial Programming, ICSP, ICEPIC, microPort, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, ... logo, the Microchip logo, FilterLab, KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER, PICSTART, PRO MATE, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip ... ensure that your application meets with your specifications No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or...

Ngày tải lên: 11/01/2016, 14:26

... ECONOMONITOR, FanSense, In -Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, mTouch, PICkit, PICDEM, PICDEM.net, PICtail, PIC3 2 logo, PowerCal, PowerInfo, ... following tasks: • • • • Start the motor Detect zero-crossing Commutate the stator Adjust commutation rate to match motor speed Starting the motor Starting the motor is the trickiest part of sensorless ... in each table protect the system from a bad table index FIGURE 4: BLDC MOTOR WAVEFORM Volts (Normalized to DC Drive) BLDC Motor Waveform (PWM at 100% Duty Cycle) 1.5 B C A ABS(B-C) ABS(C-A) ABS(A-B)...

Ngày tải lên: 11/01/2016, 16:47

... sense PI d PWM u i Fig DC- DC converter controller III NEW POWER CONTROL STRATEGY In order to extract the maximum power available at various wind speeds, two different control algorithms are normally ... voltage polarity is not inverted The voltage ratio is defined as: VDCout = −u (1 − u ) VDCin Where VDCin is the supply voltage, VDCout is the output voltage and u is the duty cycle ratio The state-space ... different control algorithms are normally applied to the VSWT: pitch angle control and speed (torque) control The pitch control algorithm is used to change the pitch angle and the blades turn out...

Ngày tải lên: 03/01/2014, 19:15

... may vary with sampling time, dc- link voltage, hysteresis bandwidth, motor parameters especially the phase inductance, motor speed, snubber circuit, and the amount of load torque If a BLDC motor ... the uncontrolled open-loop stator flux linkage locus when N m and 1.2835 N m load torque are applied to the BLDC motor with ideal trapezoidal back-EMF, respectively Steady-state speed control ... difficulty of the flux control if it is used in the control scheme The steady-state speed is 30 mechanical rad/s and the dc- link voltage Vd, equals 33.94 V Since the speed is controlled a better...

Ngày tải lên: 03/01/2014, 19:44

... Title Block Indirect torque control method of BLDC motor explained in [9] was extended to a direct torque and indirect flux control technique for six-switch inverter BLDC motor in [7] which is suitable ... Torque and Indirect Flux Control of Brushless DC Motor with Non-sinusoidal Back-EMF,” IEEE, pp 1373-1378, 2008 [8] F Bodin, S Siala, “New reference frame for brushless dc motor drive,” in Proc IEE-PEVD ... equation (6) eliminates the speed term in the denominator which causes problem at zero and near zero speeds 2.3 Control of Stator Flux Linkage Amplitude Since BLDC motor does not have sinusoidal...

Ngày tải lên: 03/01/2014, 19:45

... accordance with the simulation result obtained in Fig Since only the torque is controlled without speed control, the time range of control system under transient state is selected short The motor speeds ... DTC OF BLDC MOTOR DRIVE (CCW) (a) (b) (c) factors such as sampling time, dc- link voltage, hysteresis bandwidth, motor parameters especially the winding inductance, motor speed, snubber circuit, ... uncontrolled open-loop stator flux linkage locus when 1.2835 N·m load torque is BLDC to the BLDC motor with actual backapplied Position Hysteresis EMF waveforms, respectively Steady-state speed...

Ngày tải lên: 03/01/2014, 19:46

... the 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 ... V @ 1.0 A A schematic diagram of a DC motor is shown in Figure Figure Schematic Diagram of a DC Motor Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System Kevin Craig 10 Motion ... power amplifier Motor speed is measured using an analog tachometer Figure Physical System Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System Kevin Craig The DC motor/ tachometer...

Ngày tải lên: 25/01/2014, 13:20

... 10-bit ADC channel on the PICmicro microcontroller determines the motor speed The microcontroller uses the ADC results to calculate the duty cycle of the PWMs and thus, the motor frequency The ADC ... ring motor functions like a squirrel cage motor SPEED- TORQUE CHARACTERISTICS OF INDUCTION MOTORS Figure shows the typical speed- torque characteristics of an induction motor The X axis shows speed ... frequencies Slip Speed Base Speed Synchronous speed minus base speed Speed specified on the nameplate of an induction motor Stator Break Down Torque Synchronous Motor Maximum torque on the speed- torque...

Ngày tải lên: 11/01/2016, 14:28

... measurement can be performed with a BDC motor by measuring the back EMF voltage from the motor (see Figure 3) The BDC RPM is directly proportional to the back EMF voltage Since a BDC motor can be modeled ... demonstrates a low-cost BDC Motor Control system using the ECCP configured in full-bridge PWM mode (see Figure 5) The user interface allows the user to easily configure a BDC motor with the PIC1 6F684, adjust ... power stage for motor control, communication for RS-232, and measurement for RPM and current The power stage consists of a full H-bridge used for bidirectional BDC motor control The PIC1 6F684 uses...

Ngày tải lên: 11/01/2016, 14:35

... A B C DC+ Off DC- DC+ DC- Off PWM5(Q5) PWM2(Q2) Off DC- DC+ PWM5(Q5) PWM0(Q0) DC- Off DC+ PWM3(Q3) PWM0(Q0) DC- DC+ Off PWM3(Q3) PWM4(Q4) Off DC+ DC- SEQUENCE FOR ROTATING THE MOTOR IN COUNTERCLOCKWISE ... PWM5(Q5) PWM2(Q2) Off DC- DC+ PWM1(Q1) PWM2(Q2) DC+ DC- Off PWM1(Q1) PWM4(Q4) DC+ Off DC- PWM3(Q3) PWM4(Q4) Off DC+ DC- 0 PWM3(Q3) PWM0(Q0) DC- DC+ Off PWM5(Q5) PWM0(Q0) DC- Off DC+ DS00899A-page ... can be controlled, thus controlling the speed In this section, we will see how the peripherals on the PIC1 8FXX31 can be used to control a BLDC motor The PWM outputs from the PIC1 8FXX31 control...

Ngày tải lên: 11/01/2016, 14:35

... Đặc tính tải Thêm Radd nối tiếp cuộn dây phần ứng Example 1: Example 2: Example 3: Đặc tính động DC kích từ nối tiếp Example 4: Example 5: ...

Ngày tải lên: 17/12/2013, 14:15

... speed control method 38 4.3.2 Open Loop V/f speed control method using PI controller 42 4.3.3 Closed Loop V/f speed control method using PI controller 44 4.4 Vector Control ... throughout the speed range This makes constant V/f method the most common speed control method of an induction motor 4.3.1 Closed Loop V/f speed control method The basis of constant V/f speed control ... Constant V/f Speed Control Method 39 | P a g e Simulation and Speed Control of Induction Motor Drives 2012 Torque (N-m) Rotor Speed (rpm) Figure 4.6 Torque -Speed Characteristics with Starting...

Ngày tải lên: 18/12/2013, 22:06

... Characterization ofthe studied motor IV CONTROL SCHEME FOR BDCM In this paper, two different control schemes are studied They are simulated using data corresponding to a motor with a very simple design ... audible bandwith, acoustic noise occurs In the linear control scheme, the motor currents are compared to the references and the errors are processed by PI controllers to provide a control signal ... performances can be obtained at low and medium speeds A high speed, the phase shift introduced by the t controller may become unacceptable A large bandwith controller is thus needed to minimize the...

Ngày tải lên: 03/01/2014, 19:44

... FLUX CONTROL OF BRUSHLESS DC MOTOR TABLE I SWITCHING TABLE FOR DTC OF BLDC MOTOR USING THREE-PHASE CONDUCTION indirectly kept at its optimum level, while the motor speed is less than the base speed ... programming-based control of brushless motors,” IEEE Trans Control Syst Technol., vol 11, no 1, pp 139–146, Jan 2003 [19] S J Kang and S K Sul, “Direct torque control of brushless dc motor with nonideal ... direct torque and indirect flux control (DTIFC) of BLDC motor drive using three-phase conduction Fig Experimental test-bed (a) Inverter and DSP control unit (b) BLDC motor (T e m te d = 1.28352 N·m)...

Ngày tải lên: 03/01/2014, 19:46

... comparison, a typical Vector Control scheme for synchronous motors (sine type machines) is depicted in Fig 1, followed by a typical Phase Current Control scheme for brushless DC motors (trapezoidal ... the conventional control system for BLDC motor (Fig 2) The motor is fed by a PWM-controlled MOSFET inverter As we can see in Figs and 3, the currents are controlled by current controllers in stationary ... currents * i generation q + − + − + − Current Controller Current Controller Current Controller INVERTER * va * vb * vc Load Hall sensors Position θe eq BLDC motor PWM Measured currents ed − ia ib =...

Ngày tải lên: 03/01/2014, 19:46

... code with our motor, lets consider what happens when a voltage is applied to a DC motor A greatly simplified electrical model of a DC motor is shown in Figure FIGURE 5: DC MOTOR EQUIVALENT CIRCUIT ... 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, AN0, ADC...

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 speed ... (INPUT – OUTPUT) X GAIN Motor control diagram PROCESSOR H-BRIDGE CIRCUIT DC MOTOR ENCODER PID Closed loop control system PID controls the gain portion of the closed loop control system PID algorithms ... U27C 74HC14 R Motor R8 4.7K 13 U6B 11 Tach Input A R9 4.7K Tach Input B D5 5V D6 5V U27D 74HC14 12 74HC86 U6D 74HC86 Motor control diagram PROCESSOR H-BRIDGE CIRCUIT DC MOTOR ENCODER Control systems...

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 excitation ... 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 as dc drives Also ... running of a DC motor with PWM (unipolar) excitation (5 hp 240V 1200 rpm) rated torque Tr = 30 N.m DC Motor Model Simulation Results Voltage Average Applied To Motor Motor Speed (Rad/S) Motor Current...

Ngày tải lên: 09/07/2014, 20:20

... the DC Motor DC motors have been used in advanced control algorithms in DC drives because of their stable and straightforward characteristics The DC motor takes in a DC Motor Position and Speed ... the Actual (DC Motor) Speeds with the Closed Loop Control System Figure 4.40: 90 91 Speed Error Between the Reference (desired) and the Actual (DC Motor) Positions with the Closed Loop Control System ... AIM 61 4.6 Speed Tracking Control for PMDC Motor 66 4.7 Position and Speed Tracking (PAST) System for the PMDC Motor 4.8 4.9 72 Training ANN Inverse Model (AIM) of the PMDC Motor with Position...

Ngày tải lên: 04/10/2015, 10:25

... WAVE FORM WITH PWM SWITCHING FIGURE 15: BLOCK DIAGRAM OF FULL STEP CONTROL toff V RB2 PWM RB3 Time PIC1 8C452 RB4 Winding A Motor Driver RB5 Current Winding B Time STEPPER MOTOR CONTROL To control ... reluctance motor and the permanent magnet motor principles Such motors are called hybrid motors (HB), which give much smaller step angles, as small as 0.9 degrees per step A typical hybrid motor is ... cost motors with typical step angles of 7.5 degrees to 15 degrees VARIABLE RELUCTANCE (VR) STEPPER MOTOR There is a type of motor where the rotor is not cylindrical, but looks like bars with...

Ngày tải lên: 11/01/2016, 14:27