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LS7560 Scheda tecnica(PDF) 7 Page - LSI Computer Systems |
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LS7560 Scheda tecnica(HTML) 7 Page - LSI Computer Systems |
7 / 8 page 11 14 10 17 15 12 V M OUT1 OUT3 OUT4 OUT6 V R FIGURE 7. FOUR PHASE HALFWAVE MOTOR CONTROLLER 19 2 20 23 ENABLE TOP DRIVER POLARITY SELECT BRAKE (+) (-) OVERCURRENT SENSE 22 23 5 7 6 8 BRAKE SELECT BRAKE TACH OUT OUT V R V R (-) (+) ERROR AMP 1M 100K SPEED CONTROL PWM RATE CONTROL FIGURE 8. PWM BRAKING 0.1µF V R BRAKE BRAKE BRAKE BRAKE BRAKE BRAKE BRAKE BRAKE BRAKE BRAKE TYPICAL VALUES * * * * R2 R1 C1 FIGURE 7. This four phase half wave motor controller uses the same BRAKE circuit as in Figure 4 and switches the Top Driver Select from a high to a low as in Figure 6. FIGURE 8. Using an analog switch (such as the CD4066) PWM braking can be employed when the brake is applied. At that time, the error amplifier is configured as a voltage follower and its input is switched from the speed adjustment control to the PWM rate control. By adjusting the PWM rate control, the average motor current during braking can be controlled. 7560-040198-7 |
Codice articolo simile - LS7560 |
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Descrizione simile - LS7560 |
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