会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明授权
    • Inverter with improved overcurrent protection circuit, and power supply and electronic ballast therefor
    • 逆变器具有改进的过流保护电路,以及电源和电子镇流器
    • US07489531B2
    • 2009-02-10
    • US11536195
    • 2006-09-28
    • Bhadresh Mehta
    • Bhadresh Mehta
    • H02H7/122
    • H02M7/53803H02M1/32H02M2001/0009H05B41/2856Y10S323/901Y10S323/908
    • An inverter (100) comprises first and second input terminals (102,104), an inverter output terminal (106), a series arrangement of a first inverter transistor (110) and a second inverter transistor (120), a driver circuit (130), a primary current sensing circuit (150,154,156), and an auxiliary current sensing circuit (160). Primary current sensing circuit (150,154,156) is coupled between second inverter transistor (120) and a current-sense input (132) of driver circuit (130). Auxiliary current sensing circuit (160) is coupled between second inverter transistor (120) and a frequency control input (134) of driver circuit (130). During operation, if the current flow through inverter transistors (110,120) exceeds a predetermined peak limit, auxiliary current sensing circuit (160) provides an auxiliary signal to frequency control input (134) of driver circuit (130), thereby increasing a drive frequency at which driver circuit (130) commutates inverter transistors (110,120). The increase in the drive frequency reduces the peak current flow through inverter transistors (110,120), thereby protecting inverter transistors (110,120) from excessive power dissipation and potentially destructive heating.
    • 逆变器(100)包括第一和第二输入端(102,104),反相器输出端(106),第一反相器晶体管(110)和第二反相晶体管(120)的串联布置,驱动电路(130) 初级电流感测电路(150,154,156)和辅助电流感测电路(160)。 初级电流感测电路(150,154,156)耦合在第二反相器晶体管(120)和驱动器电路(130)的电流检测输入端(132)之间。 辅助电流感测电路(160)耦合在第二反相器晶体管(120)和驱动电路(130)的频率控制输入端(134)之间。 在操作期间,如果流过逆变器晶体管(110,120)的电流超过预定的峰值极限,辅助电流感测电路(160)向驱动电路(130)的频率控制输入端(134)提供辅助信号,从而增加驱动频率 所述驱动电路(130)使逆变器晶体管(110,120)换向。 驱动频率的增加减少了逆变器晶体管(110,120)流过的峰值电流,从而保护逆变器晶体管(110,120)不受过度功耗和潜在的破坏性加热。
    • 3. 发明授权
    • Power supply and electronic ballast with voltage clamping circuit
    • 电源和电压镇流器带有钳位电路
    • US07529107B2
    • 2009-05-05
    • US11535699
    • 2006-09-27
    • Bhadresh Mehta
    • Bhadresh Mehta
    • H02H7/125H05B37/02
    • H02H7/1213H05B41/2853
    • A circuit (20) for powering a load (50) includes a rectifier circuit (200), a voltage clamping circuit (300), and a DC-to-DC converter (400) such as a buck-boost converter. Voltage clamping circuit (300) is coupled between the rectifier circuit (200) and the DC-to-DC converter (400), and functions to prevent the input voltage (VIN) of the DC-to-DC converter (400) from exceeding a predetermined acceptable level, so as to protect the DC-to-DC converter (400) from damage due to transients in a voltage (VAC) provided by an AC line source (40). Preferably, voltage clamping circuit (300) is realized by an arrangement that includes a voltage divider circuit (320), a voltage sensing circuit (340), and an energy-limiting circuit (360), and is well-suited for use in power supplies and in electronic ballasts for powering gas discharge lamps.
    • 用于为负载(50)供电的电路(20)包括整流器电路(200),电压钳位电路(300)和诸如降压 - 升压转换器的DC-DC转换器(400)。 电压钳位电路(300)耦合在整流电路(200)和DC-DC转换器(400)之间,并且用于防止DC-DC转换器(400)的输入电压(VIN)超过 预定的可接受电平,以便保护DC-D​​C转换器(400)免受由AC电源(40)提供的电压(VAC)中的瞬变的损坏。 优选地,钳位电路(300)通过包括分压器电路(320),电压感测电路(340)和限能电路(360)的装置实现,并且非常适合用于电力 供应和电子镇流器为气体放电灯供电。