一.前言普通电机的需要量,与市场的行情有着密切的关系。据八○年八月至八一年三月的统计,其供需动态如图1所示,这对电机行业来说,可谓是一种市场行情的晴雨表。电动机和电灯一样,经历着相同的发展历史。目前,普通电机已经改进到了再难以完善的程度。然而,由于最新半导体技术的发展、电动机控制技术的发明创造、以及产品价格的激烈竞争,所以有关降低产品价格、提高生产效率方面的发明创造成果,其申请数量有所增加,目前可以预料,这种趋势将不会改变。 I. Introduction Ordinary motor needs, and the market has a close relationship. According to statistics from August 1980 to March 1981, the dynamics of supply and demand are shown in Figure 1. This is a barometer of the market for the motor industry. Electric motors, like electric lights, go through the same history of development. At present, the average motor has been improved to the extent it is difficult to perfect. However, due to the latest semiconductor technologies, the invention of motor control technology, and fierce competition in product prices, there has been an increase in the number of applications for inventions and inventions relating to the reduction of product prices and the improvement of production efficiency. It is currently expected that this The trend will not change.