© 2002 Microchip Technology Incorporated. All Rights Reserved. 1 Motor Control Solutions Microchip Technology Inc.

© 2002 Microchip Technology Incorporated. All Rights Reserved. 2 Drivers for Electronic Content in Motor Control l Control motor speed l Diagnose and preempt motor failure l Increase motor’s lifetime in the field l Bring to market less expensive motors l Control motor speed l Diagnose and preempt motor failure l Increase motor’s lifetime in the field l Bring to market less expensive motors

© 2002 Microchip Technology Incorporated. All Rights Reserved. 3 Drivers for Electronic Content in Motor Control (cont.) l Worldwide Government Regulations l Push to energy efficient motors l Complex control algorithms for better energy efficiency l Ubiquitous Connectivity l Field buses growing in use in the factory l Any white goods appliance or consumer product with motor to be connected within the home l Worldwide Government Regulations l Push to energy efficient motors l Complex control algorithms for better energy efficiency l Ubiquitous Connectivity l Field buses growing in use in the factory l Any white goods appliance or consumer product with motor to be connected within the home

© 2002 Microchip Technology Incorporated. All Rights Reserved. 4 Motor Control Solution CalculateMeasureControl The Basic Functions for Engineering the Solution Motor

© 2002 Microchip Technology Incorporated. All Rights Reserved. 5 Electronics for Driving Motors (The Block Diagram) CalculateMeasureControl Rotation Position Temperature Timing Math Functions Pulse Width Modulation Power Drivers PICmicro ® MCUs A-to-D Converters Temperature Sensors PICmicro MCUs dsPIC™ devices CCP/PWM MOSFET Power Drivers

© 2002 Microchip Technology Incorporated. All Rights Reserved. 6 Motor Control Loops Open Loop and Closed Loop

© 2002 Microchip Technology Incorporated. All Rights Reserved. 7 Open Loop Control CalculateMeasureControl Motor No Feedback! Simple to Implement! Timing Pulse Width Modulation Power Drivers

© 2002 Microchip Technology Incorporated. All Rights Reserved. 8 Open Loop Control l No Feedback! l Basic control suitable for systems with simple loads such as fans l Tight speed control is not required l Examples of Open Loop Control l Single speed with automatic shutoff l Motor with manual multiple speed settings l No Feedback! l Basic control suitable for systems with simple loads such as fans l Tight speed control is not required l Examples of Open Loop Control l Single speed with automatic shutoff l Motor with manual multiple speed settings

© 2002 Microchip Technology Incorporated. All Rights Reserved. 9 Open Loop Control l Drives Solution Type l Simpler, timer based solution l No complex calculations l Most common no measurement l Current sense for overload / stall conditions l Simplest PICmicro solutions can solve l PIC12C509A - 8 pin MCU l Drives Solution Type l Simpler, timer based solution l No complex calculations l Most common no measurement l Current sense for overload / stall conditions l Simplest PICmicro solutions can solve l PIC12C509A - 8 pin MCU

© 2002 Microchip Technology Incorporated. All Rights Reserved. 10 Closed Loop Control CalculateMeasureControl Motor Two Types: “With Sensor” and “Sensorless” Pulse Width Modulation Power Drivers Rotation Position Temperature Timing Math Functions

© 2002 Microchip Technology Incorporated. All Rights Reserved. 11 Closed Loop Control l Determine rotor position and/or speed from one or more sensors l For accurate speed and control l Two types of closed loop control l Sensor l Sensorless l Determine rotor position and/or speed from one or more sensors l For accurate speed and control l Two types of closed loop control l Sensor l Sensorless

© 2002 Microchip Technology Incorporated. All Rights Reserved. 12 Closed Loop Control “With Sensor” l With Sensor l Hall Effect l Quadrature Encoders l Resolvers (R to D converters) l Sensors provide either digital or analog output l With Sensor l Hall Effect l Quadrature Encoders l Resolvers (R to D converters) l Sensors provide either digital or analog output

© 2002 Microchip Technology Incorporated. All Rights Reserved. 13 Closed Loop Control “Sensorless” l Reduce system cost by eliminating sensors l Measures current flowing in the motor l Measure back EMF voltage (V) for motors with magnets l Measure inductance (L) in switched reluctance motors l Reduce system cost by eliminating sensors l Measures current flowing in the motor l Measure back EMF voltage (V) for motors with magnets l Measure inductance (L) in switched reluctance motors