PWM and DC Motor Control

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Presentation transcript:

PWM and DC Motor Control Chapter 11 PWM and DC Motor Control

Selected DC Motor Characteristics (http://www.Jameco.com) Part No. Nominal Volts Volt Range Current RPM Torque 154915CP 3 V 1.5–3 V 0.070 A 5,200 4.0 g-cm 154923CP 0.240 A 16,000 8.3 g-cm 177498CP 4.5 V 3–14 V 0.150 A 10,300 33.3 g-cm 181411CP 5 V 0.470 A 10,000 18.8 g-cm

DC Motor Rotation (Permanent Magnet Field)

H-Bridge Motor Configuration

H-Bridge Motor Clockwise Configuration

H-Bridge Motor Counterclockwise Configuration

H-Bridge in an Invalid Configuration

Some H-Bridge Logic Configurations Motor Operation SW1 SW2 SW3 SW4 Off Open Clockwise Closed Counterclockwise Invalid

Bidirectional Motor Control Using an L298 Chip

Pulse Width Modulation Comparison

DC Motor Connection Using a Darlington Transistor

DC Motor Connection Using a MOSFET Transistor

CTRLA (Control A) Register

Wave Generation Options

Normal PWM Operation

TCC Configuration Summary

Single-Slope PWM Operation

Dual-Slope Pulse Width Modulation

Counter Update and Overflow Event/Interrupt Conditions

Waveform Generation Set/Clear Conditions

Deadband