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PDF HEF4752V Data sheet ( Hoja de datos )
| Número de pieza | HEF4752V | |
| Descripción | A.C. motor control circuit | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de HEF4752V (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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INTEGRATED CIRCUITS
DATA SHEET
For a complete data sheet, please also download:
• The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC
• The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC
HEF4752V
LSI
A.C. motor control circuit
Product specification
File under Integrated Circuits, IC04
January 1995
1 page  
Philips Semiconductors
A.C. motor control circuit
Product specification
HEF4752V
LSI
APPLICATION INFORMATION
Figure 2 shows the functional block diagram of a 3-phase
a.c. motor speed control system using a thyristorized
inverter with variable frequency output. The inverter
control signals are generated by the HEF4752V
(PWM-IC). A special feature of the PWM (Pulse-Width
Modulation) - IC is here, that the motor is supplied by
sinoidally modulated pulses, hence the resulting motor
current will approach a sine-wave with a minimum on
higher harmonics. In this way, an optimum speed drive
with high performance is obtained.
Furthermore, the HEF4752V contains all logic circuitry
required for this special waveform generation, so that the
amount of control circuit components is reduced
considerable. The speed drive system in Fig.2 is controlled
by the analogue control section.
The FCT and VCT clock pulse oscillators are driven in
such a way, that a fast response speed control of the a.c.
motor is obtained, depending on: the reference values for
speed; motor voltage; motor current (Limited by the
measured motor current via DCCT - d.c. current
transformer -); the increasing value of VCb during braking
action.
Fig.2 PWM motor speed control system using HEF4752V.
January 1995
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet HEF4752V.PDF ] | |
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