参数资料
型号: ST92E141K4D1
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 16-BIT, UVPROM, 25 MHz, MICROCONTROLLER, CDIP32
封装: WINDOWED, SHRINK, CERAMIC, DIP-32
文件页数: 20/178页
文件大小: 1097K
代理商: ST92E141K4D1
116/178
ST92141 - 3-PHASE INDUCTION MOTOR CONTROLLER (IMC)
7.4 3-PHASE INDUCTION MOTOR CONTROLLER (IMC)
7.4.1 Introduction
The IMC controller is designed for variable speed
motor control applications. Three PWM outputs
are available for controlling a three-phase motor
drive. Rotor speed feedback is provided by captur-
ing a tachogenerator input signal.
7.4.2 Main Features
s
10-bit PWM Up/Down Counter
s
Classical and zerocentered PWM operating
modes
s
Full-scale PWM generation
s
6-bit dead time generator
s
Rotor speed measurement
s
8 interrupt sources + 1 NMI
7.4.3 Functional Description
The IMC controller consists of the following func-
tion blocks:
– Input and Output pins
– Rotor speed measurement
– 3-Phase PWM signal generation
– 6-bit Dead Time generation
– Polarity selection
– Interrupt generation
The block diagram is shown in Figure 62.
Figure 62. IMC Controller Block Diagram
10-bit PWM Counter
11-bit Compare U Reg.
11-bit Preload Compare U Reg.
11-bit Compare V Reg.
11-bit Preload Compare V Reg.
11-bit Compare W Reg.
11-bit Preload Compare W Reg.
10-bit Preload Compare 0 Reg.
10-bit Compare 0 Reg.
Dead Time
Generator
Dead Time
Generator Reg.
Polarity
Selection
&
Output
Registers
8-bit Repetition
Down-Counter
8-Bit Repetition
Counter Reg.
PWM Counter
Prescaler Reg.
8-bit Prescaler
16-Bit Tacho Counter
16-Bit Tacho Capture Reg.
Tacho Prescaler Reg.
12-Bit Prescaler
DIV 2
OTC Int.
CPT Int.
CM0 Int.
ZPC Int.
ADT Int.
INTCLK
CMS bit
CPC bit
CPT=0
TACHO
UH
UL
CLR on CPT
OVF
CPU Int.
CPV Int.
CPW Int.
Dead Time
Generator
Dead Time
Generator
VH
VL
WH
WL
8-Bit Tacho Compare Reg.
NMI
NMI Int.
NMI Control
Logic
NMIE
bit
NMIL
bit
9
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