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ST-Microelectronics Introduces ST9+ Microcontroller with Motor Control Peripheral |
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Company: |
ST-Microelectronics |
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Category: |
New Products |
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Date: |
03-Jun-1999 |
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| San Genis, France (microcontroller.com) - ST-Microelectronics has
introduced a new ST9+ microcontroller, the ST92141, with an on-chip motor control
peripheral. The ST92141 contains an Induction Motor Control (IMC) peripheral that allows automatic control of a 3-phase induction motor with minimum processor overhead. Features of the ST92141 include:
The 25MHz operating frequency of the IMC cell allows switching frequencies above the audible frequency range. The dedicated tacho-generator input and six PWM outputs (high and low side outputs for each of the three phases) greatly reduce the external interface components required for a 3-phase motor control system. The sinewaves generated by ST92141 which drive the motor windings have 1024 levels of resolution, improving overall efficiency by significantly reducing current ripple and harmonic losses. In addition, the dead-time for driving the power stage is programmable up to 5.2us, with a resolution of 80ns. The IMC peripheral allows the major control tasks to be handled automatically, freeing the microcontroller to implement standard PID regulation or fuzzy logic algorithms for variable speed regulation and other control tasks. The ST92141 is based on the ST-Microelectronics 8/16-bit ST9+ family. The ST9+ family is a register-based CISC architecture, with a rich assembly language. At its core is a 224-byte register file which can be used as a destinations register for most arithmetic operations, as well as be used for general-pirpose RAM storage. For more information on this product, contact ST-Microelectronics. |
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