专利汇可以提供Overload current protector for A. C. motors专利检索,专利查询,专利分析的服务。并且The specification discloses a system for preventing current overload in a multi-phase alternating current motor. Current transformers are coupled to each of the phases of the motor and voltage outputs of each of the transformers and are connected to a summing point. A differential amplifier is connected to the summing point for detecting the occurrence of a current overload on any of the phases. A digital circuit is connected to the differential amplifier for generating a logic level in dependence upon the output of the amplifier. A timing circuit including a normally conductive field effect transistor is coupled to the digital circuit. Upon the occurrence of an overload signal, the timing circuit initiates a timing cycle during which current may not be reapplied to the motor. A transistor switch normally maintains a triac in conduction and the triac operates the contactor relay to normally supply current to the motor phases. Upon the occurrence of an overload current, the transistor switch turns the triac off and terminates current flow to the phases of the motor. Light emitting diodes are provided to indicate when the timing cycle is in effect and when a current overload condition exists.,下面是Overload current protector for A. C. motors专利的具体信息内容。
标题 | 发布/更新时间 | 阅读量 |
---|---|---|
一种基于泄漏电流差异系数的电缆寿命预测方法 | 2020-05-08 | 606 |
全光纤电流互感器开环解调及半波电压跟踪方法 | 2020-05-12 | 41 |
电动汽车充电设备谐波电流控制方法 | 2020-05-14 | 891 |
一种基于双端平衡因子的XLPE电缆绝缘寿命估算方法 | 2020-05-08 | 386 |
一种抽水蓄能电站水泵启动过程差动保护方法和装置 | 2020-05-14 | 503 |
一种基于NB-IOT通讯技术的电气火灾监控智能用电开关系统 | 2020-05-11 | 767 |
雷击浪涌防护电路、方法、系统、存储介质及电子装置 | 2020-05-12 | 844 |
一种接地变压器零序差动保护方法及装置 | 2020-05-13 | 894 |
一种超声波电源 | 2020-05-08 | 640 |
一种适用于小机组的发电机保护成套装置 | 2020-05-11 | 544 |
高效检索全球专利专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台,是提供专利分析,专利查询,专利检索等数据服务功能的知识产权数据服务商。
我们的产品包含105个国家的1.26亿组数据,免费查、免费专利分析。
专利汇分析报告产品可以对行业情报数据进行梳理分析,涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度,系统通过AI智能系统对图表进行解读,只需1分钟,一键生成行业专利分析报告。