The moving coil is wound with many turns of enameled or silk covered copper wire. A permanent magnet moving coil pmmc meter also known as a d arsonval meter or galvanometer is an instrument that allows you to measure the current through a coil by observing the coils angular deflection in a uniform magnetic field. This could of use for college going students, gate aspirants, and. Product support home page for pmcs motion control cards. Construction of pmmc instruments the constructional features of this instrument are shown in fig. Measuring instruments ppt video online download 31 pmmc instruments. What is permanent magnet moving coil or pmmc instrument. What is the abbreviation for power management instruments. This video is intended to explain the very basics of a pmmc instrument. If you want to see the real scope, check out a few of the large, webbased employment.
Level gaugesswitchesmagneticreflex, bicolor, boiler level gauge. Constructional features of pmmc enameled or silk covered copper wire is used for coil 5. Permanent magnet moving coil or pmmc instrument definition. The working principle of pmmc instruments are same as that of darsonaval type of galvanometer, difference being that a direct reading instrument is provided with pointer and scale.
Ppt project management professional pmp powerpoint. Working principle and construction of pmmc polytechnic hub. The pmmc stands for permanent magnet moving coil and it is also called as darsonval instruments. Pmmc instruments explained in hindi english subtitles. Prof avishek chatterjee department of electrical engineering iit kharagpur. Permanent magnet moving coil or pmmc instruments are the most accurate type for the measurement of dc current or voltage. When a current carrying coil is placed in the magnetic field produced by permanent magnet, the coil experiences a force and moves. The instruments which use the permanent magnet for creating the stationary magnetic field between which the coil moves is known as the permanent magnet moving coil or pmmc instrument.
The coils move freely in the field of a permanent magnet. Pmmc instruments, galvanometer, dc voltmeter, dc ammeter. Project management professional pmp certification study guide a free powerpoint ppt presentation displayed as a flash slide show on id. Pmi abbreviation stands for power management instruments. The coil is mounted on rectangular aluminum former, which is pivoted on jeweled bearings. Permanent magnet moving coil pmmc instruments to measure dc current or dc voltage can be used for measuring ac currents and voltages by introducing additional circuit and proper calibration 4. A permanent magnet is used to produce magnetic flux and a coil that carries the current. Permanent magnet moving coil instruments pmmc the permanent magnet moving coil instruments are most accurate type for direct current measurements. Pmmc instruments construction and working principle. Get the latest updates here for your motion controller including mauals, firmware, and application programs. Electrical instruments ppt video online download 38 repulsion or doubleiron type movingiron instrument. Electrical and electronics instruments moving iron instruments attraction type repulsion type moving iron instruments electrodynamometer type wattmeter power measurement in 3 phase 3. The action of these instruments is based on the motoring principle.
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