公开(公告)号：US09226377B2

公开(公告)日：2015-12-29

申请号：US14330437

申请日：2014-07-14

Applicant: Lutron Electronics Co., Inc.

Inventor： Robert C. Newman, Jr. ,  Robert T. Nachtrieb

IPC: H05B41/16 ,  H05B41/282 ,  H05B41/392 ,  H05B33/08

CPC classification number: H05B41/16 ,  H05B33/0809 ,  H05B41/2828 ,  H05B41/3925 ,  Y02B20/19

Abstract: A circuit for controlling a lighting load may operate to minimize flicker in the lighting load and electromagnetic interference (EMI) noise generated on an AC voltage supply for the lighting load. The circuit comprises a bus-voltage-generating circuit for generating a bus voltage, a load regulation circuit having an inverter circuit, and a high speed control circuit characterized by a cutoff frequency much greater than a frequency of a voltage ripple on the bus voltage. The control circuit may comprise an error amplifier circuit configured to spread the frequency of operation of the inverter circuit at a set intensity level of the lighting load into a spread spectrum of frequencies to reduce the time average of peaks of the spectrum of frequencies and peak EMI levels. The circuit may also comprise a non-linear amplifier circuit amplifying a lamp-current-feedback signal representative of the magnitude of the load current through the lighting load.

Abstract translation: 用于控制照明负载的电路可以操作以最小化照明负载中的闪烁和用于照明负载的AC电压源上产生的电磁干扰（EMI）噪声。 该电路包括用于产生总线电压的总线电压产生电路，具有逆变器电路的负载调节电路和特征在于远大于总线电压上的电压纹波频率的截止频率的高速控制电路。 控制电路可以包括误差放大器电路，其被配置为将逆变器电路的工作频率以照明负载的设定强度水平扩展到频率扩展频谱中，以减少频谱峰值和峰值EMI的时间平均 水平。 电路还可以包括放大灯电流反馈信号的非线性放大器电路，其表示通过照明负载的负载电流的大小。

公开(公告)号：US20140320033A1

公开(公告)日：2014-10-30

申请号：US14330437

申请日：2014-07-14

Applicant: Lutron Electronics Co., Inc.

Inventor： Robert C. Newman, JR. ,  Robert T. Nachtrieb

IPC: H05B41/16 ,  H05B33/08

CPC classification number: H05B41/16 ,  H05B33/0809 ,  H05B41/2828 ,  H05B41/3925 ,  Y02B20/19

Abstract: A dimmable ballast circuit for a compact fluorescent lamp controls the intensity of a lamp tube in response to a phase-control voltage received from a dimmer switch. The ballast circuit generates a lamp current through the lamp tube having a substantially constant envelope such that flicker in the lamp tube and electromagnetic interference (EMI) noise on an AC voltage supply are minimized. The dimmable ballast circuit comprises a high speed control circuit characterized by a cutoff frequency much greater than a frequency of a voltage ripple on a bus voltage of the ballast circuit. The dimmable ballast circuit may also comprise a non-linear amplifier circuit amplifying a lamp-current-feedback signal representative of the magnitude of the lamp current through the lamp.

Abstract translation: 用于紧凑型荧光灯的可调光镇流器电路响应于从调光开关接收的相位控制电压来控制灯管的强度。 镇流器电路通过灯管产生灯电流，其具有基本上恒定的包络，使得灯管中的闪烁和AC电压源上的电磁干扰（EMI）噪声最小化。 可调光镇流器电路包括高速控制电路，其特征在于截止频率远大于镇流器电路的总线电压上的电压纹波的频率。 可调光镇流器电路还可以包括放大表示通过灯的灯电流的大小的灯电流反馈信号的非线性放大器电路。