Portable Plasma Cutting Machine
1. Portable type Mainly for the small space, outside work space or low budget to set up work. easy to install and move
2. Plasma Cutting is more better than flame cutting for thin sheet less than 25mm 3. Hot sales model: 4'x8', 5'x10'
4. Metal sheet cutting and pipe cutting can be choose
5. Accept any materials cutting: Iron plate, Stainless steel plate, Titanium plate,Galvanized sheet, Aluminum plate High speed steel, etc we are specialized
Lead-acid batteries: The ideal charging current is pulsed. Since the battery is the most mature and the earliest invented high-power battery, the application is also very wide, but the charging detection circuit is not the most ideal today. This is a worldwide problem. The integrated chip of the American company solves this problem, but it is not Very ideal, barely. Pulse charging with our mains 50-60HZ power supply directly rectified unfiltered pulsating DC charging** (this is based on the simple circuit, low cost practice), I have tried to use the switching power supply and then add the mains synchronization The circuit turns the DC of the switching power supply into a pulsating charging. The effect is just as good. The advantage is that it can be used in a wide power supply range (84-264V AC). The destruction point is high in cost and complicated in circuit.
Since the self-discharge rate of the lead-acid battery is relatively large, when the power frequency charging is used, the constant voltage method is generally used (it is surely limited flow, or the transformer will be finished). The switching power supply generally adopts high voltage and small current, and the voltage rises to the normal charging value---constant current charging-----the battery voltage reaches the fast-foot state-----the relay is constant voltage charging.
Benefits of pulse charging: The battery has low heat generation, the battery has a recovery period of reduction reaction, and the current life is long (the smaller the charging current is, the more the battery has more charging cycles). The high current charging will cause the seesaw. Long-term unused batteries should be periodically discharged/charged to prevent vulcanization (caused by insufficient surface activity). Whether the power is sufficient to indicate whether the electrolyte is boiling or the temperature of the electrolyte rises, or the specific gravity increases, these are not the standards of **, and are related to the magnitude of the charging current. Of course, there is no way to think of a maintenance-free battery. It can only be determined by measuring the voltage.
Nickel-hydrogen/nickel-cadmium charging should pay attention: in winter and summer, the charging current is certain, the calorific value can not be completely fixed, so we generally use the integrated circuit with negative slope mode to play the test, or use the single-chip microcomputer to complete the test. It is a more complicated control method.
Nickel-metal hydride/nickel battery ** uses pulse charging method, which is good for battery life, and it is not easy to produce dendrite (short-circuit will be formed). DC charging is easy to produce dendrite, and good battery is charged without charge. In fact, it is a natural internal short circuit (generating dendrites), and sometimes the battery will return to normal after hitting a large current. But the lithium battery is a very special battery, do not use the pulse charging method, otherwise, it will soon be finished (because there is a control circuit, if there is no circuit, it can be charged with a small pulse, the effect is not bad), and there are The possibility of shooting.
At present, the most mature charging method is the charging circuit of lithium battery (the charging circuit is the most ideal). The most mature battery technology is lead-acid battery (but the charging circuit has been unsatisfactory), and the nickel-hydrogen/nickel-cadmium battery has defects and low energy density. The charging circuit is complicated, especially the nickel-cadmium battery is very polluting to the environment and is being phased out. All batteries, the charging current can not be too large, with the charging speed, the battery life is lost.
Portable Plasma Cutting Machine
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