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English 07/16
Service Manual
HR15/17N HYBRID DC
5.2
Hybrid Operation
In hybrid mode the system operates around two preset RPM values (called upper limit and lower limit). If
the RPM is above the upper limit, the engine will charge the batteries (regen) while performing the required
function. If it falls below the upper limit then charging stops to provide full engine power for the required
function. If the RPM drops below the lower limit then the electric motor supports the shaft (boost) to keep
the RPM above the lower limit. Figure below explains the working principle. During boost, the system
demand is always monitored such that if boost is not required it will stop supplying electric power.
The table below shows the RPM settings for various operating modes.
Mode of Operation Engine Preset RPM
(No Load)
Upper Limit Regen
Cut-Off RPM
Lower Limit Boost
Turn-On RPM
Boom / Low Speed Drive
1800
1700
1700
High Speed Drive
3500
3400
3400
CURRENT
(POSITIVE, CHARGING)
CURRENT
(NEGATIVE, BOOSTING)
MAX BOOST
CURRENT
MAX REGEN
CURRENT
BOOST ZONE
LOWER LIMIT
BOOST TURN-ON
UPPER LIMIT
REGEN CUT-OFF
REGEN ZONE
BOOST
MONITORING
Содержание HYBRID DC HR15N Series
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