High frequency HID lamp system
    3.
    发明授权
    High frequency HID lamp system 失效
    高频HID灯系统

    公开(公告)号:US5998939A

    公开(公告)日:1999-12-07

    申请号:US90596

    申请日:1998-06-04

    摘要: A high pressure gas discharge lamp system includes a high pressure discharge lamp selected to have a lowest lamp resonant frequency above the audible, on a current basis above about 19 kHz and on a power basis of above about 38 kHz. The ballast circuit energizes the discharge device so as to have a fundamental frequency below the lowest lamp resonant frequency and above the audible, while keeping the magnitude of any harmonics above the lowest lamp resonant frequency sufficiently small so as to avoid acoustic resonance. By operating below the lowest lamp resonant frequency, greatly simplifying ballast construction and cost. According to one embodiment, the discharge vessel encloses a discharge space which is circular cylindrical and having a L:ID ratio of about 1:1 to maximize the lowest lamp resonant frequency. According to another embodiment, two or more discharge devices are operated concurrently by the ballast, each having a lowest lamp resonant frequency of above the audible, and the ballast operating frequency so as to increase light output while still avoiding acoustic resonance.

    摘要翻译: 高压气体放电灯系统包括高压放电灯,其被选择为在高于约19kHz的电流基础上以及高于约38kHz的功率基础上具有低于可听见的最低灯谐振频率。 镇流器电路使放电装置通电,使基频低于最低灯谐振频率和声音之上,同时保持高于最低灯谐振频率的任何谐波的幅度足够小,以避免声共振。 通过低于最低灯谐振频率的操作,极大地简化了镇流器的构造和成本。 根据一个实施例,放电容器包围圆柱形并具有大约1:1的L:ID比的放电空间,以最大化最低的灯谐振频率。 根据另一实施例,通过镇流器同时操作两个或更多个放电装置,每个镇流器具有低于可听见的最低灯谐振频率和镇流器工作频率,以便在仍然避免声共振的同时增加光输出。