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Section 2 Power Supply
Power supply part mainly consists of generator and battery.Its function is in the closed circuit of
motorcycle,generator and battery has parallel connection and offers electric current to the electro-
equipment in electrical system,then stores the rest power in battery.
1 The structure and working principle of power supply
Power supply part mainly consists of generator and battery.Its function is in the closed circuit of
motorcycle,generator and battery has parallel connection and offers electric current to the electro-
equipment in electrical system,then stores the rest power in battery.
According to the character of electric current export,generator can be divided into DC generator and AC
generator.According to the different structure,the AC generator can be divided into AC flywheel generator,AC
magnet rotor generator and AC three-phase generator.The magnetic pole of first two has permanent
magnet,so it is also called AC permanent magnet generator.However,the last one produces magnetic pole
through electricfying the coil,so it is called AC excitation generator.Usually,the generator we talk about is
AC flywheel generator.
According to the different rated voltage of battery,it can be divided into 6V battery and 12V battery.If the
rated voltage is the same,according to the different volume,it can be divided into big and small.According
to the different structure,it can be divided into plumbum acid battery and complete seal and maintenance-
free battery.
[1]The Structure and Working Principle of DC Generator
DC generator works according to the principle of electromagnetism induction.Viz.when lead plumbs
magnetic wire and moves in the well-proportioned magnetic field,there is inductive electromotive force
produced in the lead.If the lead forms a closed circuit with other outer circuit,there is inductive electric
current produced in the lead.The direction of this electric current can be estimated through right-hand rule.
[2]The Structure and Working Principle of AC Generator
AC generator mainly consists of AC flywheel generator,AC magnet rotor generator and AC three-phase
generator.Like DC generator,it also works according to the principle of electromagnetism induction.But it
doesn’t produce electric current through the method that lead plumbs magnetic wire and moves in the
well-proportional magnetic field.It produces inductive AC through the method that the rotor which made
of permanent magnet rotates continously and comes into being a rotating magnetic field,then makes
magnetic wire continously and alternately pass the fixed coil.
[3]The Structure and Working Principle of Storage Battery
This kind of storage battery has light weight,small bulk,good seal and shockproof performance.and the
plumbum acid storage battery has small inner resistance and stable voltage.It mainly consists of battery
body,cover,plate,electrolyte and clapboard.The battery body is made of hard rubber or plastic which is
acidproof,heat-resistant and shock-proof.The battery is divided into 3 or 6 unattached parts according to
the different stated voltage.There must be marked two marks outside the battery body.The upper mark is
H and the lower one is L,which respectively indicate the upper limit and lower limit.Meanwhile,there are
anode and cathode marked on battery.“
＋
”is anode and “
－
”is cathode.
Plate is the main substance,where storage battery does chemistry of charging and discharging.It is
made of plumbum antimony alloy pieces which are painted active substance and processed through
electrochemistry.The plate is divided into anode plate and cathode plate.The active substance on anode
plate is PbO2 and on cathode plate is Pb.
Electrolyte is liquid mixed vitriol with distilled water.The temperature of electrolyte density for standard
measurement is 20
℃
.When battery is at the standard temperature and in full charge condition,its
density is between 1.24~1.29g/cm
3
.In each independent part of battery body,there is a set of plates and
electrolyte installed inside.Each set of plates respectively does the chemistry with electrolyte,and makes up
of an independent battery.Its voltage is about 2V. 3 or 6 batteries are series-wound and come into being
a storage battery with the 6V or 12V voltage.The battery cover is made of high insulative hard rubber and
hard plastic,which forms an integrated inner space with battery body.
Electrical system is an important part of motorcycle.Its structure and function directly influence the
performance and riding comfort of motorcycle.The electric system is divided into three parts:power
supply,control and power consumption.Because the ignition system of electrical system is the core of
motorcycle,it is described in the engine part.During the common usage,you should maintain the electrical
system frequently.The common trouble of electrical system of motorcycle can be looked up through the
circuit diagram,so the circuit diagram is attached both in user’s manual and maintenance manual.
Summary of Contents for ZS250GY-3
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