參數(shù)資料
型號(hào)： MC3PHACVP
廠商： MOTOROLA INC
元件分類： 運(yùn)動(dòng)控制電子
英文描述： 3-Phase AC Motor Controller
中文描述： AC MOTOR CONTROLLER, PDIP28
封裝： PLASTIC, DIP-28
文件頁(yè)數(shù)： 11/44頁(yè)
文件大小： 724K
代理商： MC3PHACVP
MC3PHAC/D
Features
MOTOROLA
3-Phase AC Motor Controller
11
Features
3-Phase Waveform Generation
— The MC3PHAC generates six PWM
signals which have been modulated with variable voltage and variable
frequency information in order to control a 3-phase ac motor. A third harmonic
signal has been superimposed on top of the fundamental motor frequency to
achieve full bus voltage utilization. This results in a 15 percent increase in
maximum output amplitude compared to pure sine wave modulation.
The waveform is updated at a 5.3 kHz rate (except when the PWM frequency
is 15.9 kHz), resulting in near continuous waveform quality. At 15.9 kHz, the
waveform is updated at 4.0 kHz.
DSP Filtering
—
A 24-bit IIR digital filter is used on the SPEED input signal in
standalone mode, resulting in enhanced speed stability in noisy environments.
The sampling period of the filter is 3 ms (except when the PWM frequency is
15.9 kHz) and it mimics the response of a single pole analog filter having a pole
at 0.4 Hz. At a PWM frequency of 15.9 kHz, the sampling period is 4 ms and
the pole is located at 0.3 Hz.
High Precision Calculations
— Up to 32-bit variable resolution is employed
for precision control and smooth performance. For example, the motor speed
can be controlled with a resolution of 4 mHz.
Smooth Voltage Transitions
— When the commanded speed of the motor
passes through
±
1 Hz, the voltage is gently applied or removed depending on
the direction of the speed change. This eliminates any pops or surges that may
occur, especially under conditions of high-voltage boost at low frequencies.
High-Side Bootstrapping
—
Many motor drive topologies (especially high-
voltage drives) use optocouplers to supply the PWM signal to the high-side
transistors. Often, the high-side transistor drive circuitry contains a charge
pump circuit to create a floating power supply for each high-side transistor that
is dependent on low-side PWMs to develop power. When the motor has been
off for a period of time, the charge on the high-side power supply capacitor is
depleted and must be replenished before proper PWM operation can resume.
To accommodate such topologies, the MC3PHAC will always provide 100 ms
of 50 percent PWM drive to only the low-side transistors each time the motor is
turned on. Since the top transistors remain off during this time, it has the effect
of applying zero volts to the motor, and no motion occurs. After this period,
motor waveform modulation begins, with PWM drive also being applied to the
high-side transistors.
Fast Velocity Updating
—
During periods when the motor speed is changing,
the rate at which the velocity is updated is critical to smooth operation. If these
updates occur too infrequently, a ratcheting effect will be exhibited on the
motor, which inhibits smooth torque performance. However, velocity profiling is
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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參數(shù)描述
MC3PHACVPE 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 8BIT MCU 8K FLASH OTP RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
MC3S12C128 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16-Bit Microcontroller
MC3S12C32 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16-Bit Microcontroller
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