Inverter device
First Claim
1. An inverter device comprising an inverse conversion circuit which converts a supplied direct-current electricity into a alternating-current electricity having a predetermined frequency, for driving a power source motor for a rotary machine, at various speeds, in which the switching control of the inverse conversion circuit is performed by a digital processor, said inverter device characterized in that a timer interrupt process having an independent constant processing cycle which is not directly related to the processing cycle of the system control in the digital processor is assigned and whether or not switching of the inverse conversion circuit is required in the timer interrupt process is determined, and the switching control is carried out on the basis of the determination, thereby controlling the inverter output frequency.
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Accused Products
Abstract
The inverter device includes an inverse conversion circuit which converts a supplied direct-current electricity into a alternating-current electricity having a predetermined frequency, and is designed to drive a motor for a rotary machine, at various speeds, in which the switching control of the inverse conversion circuit is performed by a digital processor. In this inverter device, a timer interrupt process having an independent constant processing cycle which is not directly related to the processing cycle of the system control in the digital processor is assigned. In the timer interrupt process, whether or not switching of the inverse conversion circuit is required is determined, and the switching control is carried out on the basis of the determination.
11 Citations
3 Claims
- 1. An inverter device comprising an inverse conversion circuit which converts a supplied direct-current electricity into a alternating-current electricity having a predetermined frequency, for driving a power source motor for a rotary machine, at various speeds, in which the switching control of the inverse conversion circuit is performed by a digital processor, said inverter device characterized in that a timer interrupt process having an independent constant processing cycle which is not directly related to the processing cycle of the system control in the digital processor is assigned and whether or not switching of the inverse conversion circuit is required in the timer interrupt process is determined, and the switching control is carried out on the basis of the determination, thereby controlling the inverter output frequency.
Specification