參數(shù)資料
型號： MC68HC708MP16
廠商： Motorola, Inc.
英文描述： 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述： 8位微控制器單元（MCU）。（8位微控制器）
文件頁數(shù)： 27/44頁
文件大?。?/td> 342K
代理商： MC68HC708MP16
Application Note
Switch Reluctance Motor Control
AN1712
MOTOROLA
27
Figure 13. 4-Phase Switch Reluctance Motor Control Power Stage
By programming the even numbered fault pins to operate in automatic
mode, independent cycle-by-cycle current limiting is obtained for each
pair of phases. For this to work, the DISMAP register is programmed
with $00 (or any value that ensures that PWM1 is affected only by fault
inputs 3 and 4, and PWM6 is affected only by faults 1 and 2). When
current limiting occurs, the upper transistor associated with that pair of
phases is turned off, but the bottom transistor remains on to allow
smooth freewheeling of the current through either D5 or D6. Current is
extinguished in a given phase by turning off both the top and bottom
transistors associated with that phase, forcing current commutation back
through the DC supply.
If a bus over-voltage occurs, all motor phases must be disabled. This
implies that the voltage processing circuitry must use two fault inputs,
one to disable PWM1 and one for PWM6. Both of these fault inputs
would be programmed to operate in manual mode.
P
P
CURRENT
COMPARATOR
PHASES 1/3
FAULT 4
FAULT 2
PWM1
D5
D2
D1
GPIO1
GPIO3
VOLTAGE
PROCESSING
CIRCUITRY
FAULTS 1 & 3
CURRENT
COMPARATOR
PHASES 2/4
P
P
PWM6
D6
D4
D3
GPIO2
GPIO4
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC708MP16CFU 制造商:MAJOR 功能描述:
MC68HC711D3CFBE2 制造商:Freescale Semiconductor 功能描述:
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