摘要:
A servo error signal and a defect detection signal are generated from an output signal of the pickup unit, and a servo control signal and a hold signal are generated from the servo error signal. When changing to either a servo control signal or a hold signal based on the defect detection signal generated in a defect detection signal generation circuit which has a peak hold circuit having different tracking ability, so as to perform servo control of the pickup unit, a servo error signal predetermined time before a timing to change from the servo control signal to the hold signal is used as the servo error signal used for generation of the hold signal.
摘要:
A refrigerating apparatus having a refrigerating cycle that comprises a compressor, an electric motor that drives the compressor, and an inverter device that variably controls the operating frequency of the electric motor. The inverter device includes a converter circuit that converts an A.C. voltage from an A.C. power supply into a D.C. current, an inverter circuit comprising a D.C./A.C converter, and a shunt resistance that detects a D.C. current flowing through a switching element of the inverter circuit. The shunt resistance detects a D.C. current, and the detected D.C. current value is calculated as a sine wave A.C. current for the electric motor in relation to action of the switching element.
摘要:
Machinable ceramics with 30-60 vol. % of fine crystals of fluorophlogopite, a synthetic mica, evenly dispersed in a vitreous matrix is produced using as principal raw materials kaolin and activated clay, which are natural minerals, other than metal oxides themselves. According to the production process, a mixture of fine particulate raw materials is calcined under first heat treatment conditions in which a maximum temperature is in the range of 1,000.degree.-1,100.degree. C. The raw materials include kaolin and activated clay as principal raw materials, Mg-containing, K-containing and F-containing compounds as auxiliary raw materials and B.sub.2 O.sub.3 as a sintering aid. The resulting calcined mass is ground into fine particles, followed by the formation of a green body of a desired shape. The green body is then sintered into a fired body under second heat treatment conditions in which a maximum temperature is in the range of 1,100.degree.-1,250.degree. C.
摘要翻译:30-60体积的可加工陶瓷 以金属氧化物本身以外的天然矿物质作为主要原料高岭土和活性白土作为主要原料,生产均匀分散在玻璃质基质中的合成云母的氟金云母微晶的百分比。 根据制造方法,在最高温度为1000〜-1100℃的第一热处理条件下煅烧细粒状原料的混合物。原料包括高岭土和活性粘土作为主要原料, 作为辅助原料的含Mg,K和F的化合物和作为烧结助剂的B 2 O 3。 将所得的煅烧物料研磨成细颗粒,然后形成所需形状的生坯。 然后在第二热处理条件下将生坯烧结成烧制体,其中最高温度在1100℃-150℃的范围内。