液压电机低速爬行的原因在于： (1)摩擦力的大小不稳定 通常的摩擦力是随速度增大而增加的，而对静止和低速区域工作的马达内部的摩擦阻力，当工作速度增大时非但不增加，反而减少，形成了所谓“负特性”的阻力 另一方面，液压马达和负载是由液压油被压缩后压力升高而被推动的，因此，可用图4-1(a)所示的物理模型表示低速区域液压马达的工作过程：以匀速v0推弹簧的一端(相当于高压下不可压缩的工作介质) ，使质量为m的物体(相当于马达和负载质量、转动惯量)克服“负特性”的摩擦阻力而运动。
当物体静止或速度很低时阻力大，弹簧不断压缩，增加推力 只有等到弹簧压缩到其推力大于静摩擦力时才开始运动一旦物体开始运动，阻力突然减小，物体突然加速跃动，其结果又使弹簧的压缩量减少，推力减小，物体依靠惯性前移一段路程后停止下来，直到 弹簧的运动压缩弹簧，增加推力，物体再次跳跃，形成如图所示的时间停止状态，这是液压电机的爬行现象。
(2)泄漏量大小不稳定 液压马达的泄漏量并不总是一样的，它也会随着转子旋转的相位角度的变化而周期性地波动由于低速时进入马达的流量小，泄漏所占的比重就增大，泄漏量的不稳定就会明显地影响到参与马达工作的流量数 值，从而造成转速的波动。
当马达在低速运转时，其转动部分及所带的负载表现出的惯性较小，上述影响比较明显，因而出现爬行现象 在实际工作中，最低稳定速度越小越好 7.液压电机速度液压电机的最高使用速度主要受使用寿命和机械效率的限制速度增加后，运动副磨损增加，使用寿命降低。
如果速度较高，液压电机需要输入的流量较大，因此流量相应增加 ，压力损失也随之增加，从而使机械效率降低 对某些液压马达，转速的提高还受到背压的限制例如，当曲轴连杆液体电机转速增加时，必须显著增加回油背压，以确保连杆不会撞击曲轴表面，从而避免冲击现象。
随着转速的提高，回油腔所需的背部 压值也应随之提高但过度增加背压会显著降低液压电机的效率为了使马达的效率不致过低，马达的转速不应太高 8.液压电机的调速范围以最高使用速度与最低稳定速度之比表示 90-L-055-KP-1-NN-80-L-4-S1-C-03-GBA-32-32-24 90L055KP1NN80L4S1C03GBA323224 90-L-055-KP-1-NN-80-L-4-S1-D-03-EBC-29-29-24 90L055KP1NN80L4S1D03EBC292924 90-L-055-KP-1-NN-80-L-4-S1-D-03-GBA-26-26-24 90L055KP1NN80L4S1D03GBA262624 90-L-055-KP-1-NN-80-P-3-C6-C-03-EBC-29-29-24 90L055KP1NN80P3C6C03EBC292924 90-L-055-KP-1-NN-80-P-3-C6-C-03-GBA-32-32-24 90L055KP1NN80P3C6C03GBA323224 90-L-055-KP-1-NN-80-P-3-S1-C-03-GBA-14-35-24 90L055KP1NN80P3S1C03GBA143524 90-L-055-KP-1-NN-80-P-3-S1-C-03-GBA-20-20-24 90L055KP1NN80P3S1C03GBA202024 90-L-055-KP-1-NN-80-P-3-S1-C-03-GBA-26-26-20 90L055KP1NN80P3S1C03GBA262620 90-L-055-KP-1-NN-80-P-3-S1-C-03-GBA-26-26-24 90L055KP1NN80P3S1C03GBA262624 90-L-055-KP-1-NN-80-P-3-S1-C-03-GBA-32-32-24 90L055KP1NN80P3S1C03GBA323224 90-L-055-KP-1-NN-80-P-3-S1-C-03-GBA-35-35-24 90L055KP1NN80P3S1C03GBA353524 90-L-055-KP-1-NN-80-P-3-S1-C-03-GBA-42-42-24 90L055KP1NN80P3S1C03GBA424224 90-L-055-KP-1-NN-80-P-3-S1-D-03-GBA-29-29-24 90L055KP1NN80P3S1D03GBA292924 90-L-055-KP-1-NN-80-P-3-S1-D-03-GBA-35-35-24 90L055KP1NN80P3S1D03GBA353524 90-L-055-KP-1-NN-80-P-3-S1-D-03-GBA-42-42-24 90L055KP1NN80P3S1D03GBA424224 90-L-055-KP-1-NN-80-P-3-S1-D-09-GBA-35-35-24 90L055KP1NN80P3S1D09GBA353524 90-L-055-KP-1-NN-80-P-4-C6-C-03-GBA-35-35-24 90L055KP1NN80P4C6C03GBA353524 90-L-055-KP-1-NN-80-P-4-S1-C-03-GBA-26-26-20 90L055KP1NN80P4S1C03GBA262620 90-L-055-KP-1-NN-80-P-4-S1-C-03-GBA-35-35-20 90L055KP1NN80P4S1C03GBA353520 90-L-055-KP-1-NN-80-P-4-S1-C-03-GBA-35-35-24 90L055KP1NN80P4S1C03GBA353524 90-L-055-KP-1-NN-80-R-3-S1-C-03-GBA-35-35-20 90L055KP1NN80R3S1C03GBA353520 90-L-055-KP-1-NN-80-R-3-S1-C-03-GBA-40-40-28 90L055KP1NN80R3S1C03GBA404028 90-L-055-KP-1-NN-80-R-3-S1-C-03-GBA-42-42-24 90L055KP1NN80R3S1C03GBA424224 90-L-055-KP-1-NN-80-R-3-S1-C-05-GBA-35-35-24 90L055KP1NN80R3S1C05GBA353524 90-L-055-KP-1-NN-80-R-3-S1-D-03-GBA-29-29-24 90L055KP1NN80R3S1D03GBA292924 90-L-055-KP-1-NN-80-R-4-C6-C-03-GBA-35-35-24 90L055KP1NN80R4C6C03GBA353524 90-L-055-KP-1-NN-80-R-4-S1-C-03-EBC-35-35-24 90L055KP1NN80R4S1C03EBC353524 90-L-055-KP-1-NN-80-R-4-S1-C-03-GBA-17-17-24 90L055KP1NN80R4S1C03GBA171724 90-L-055-KP-1-NN-80-R-4-S1-C-03-GBA-20-20-24 90L055KP1NN80R4S1C03GBA202024 90-L-055-KP-1-NN-80-R-4-S1-C-03-GBA-35-35-20 90L055KP1NN80R4S1C03GBA353520 90-L-055-KP-1-NN-80-R-4-S1-C-03-GBA-35-35-24 90L055KP1NN80R4S1C03GBA353524 90-L-055-KP-1-NN-80-R-4-S1-C-03-GBA-38-38-24 90L055KP1NN80R4S1C03GBA383824 90-L-055-KP-1-NN-80-R-4-S1-D-03-GBA-26-26-24 90L055KP1NN80R4S1D03GBA262624 90-L-055-KP-1-NN-80-R-4-S1-D-03-GBA-35-35-24 90L055KP1NN80R4S1D03GBA353524 90-L-055-KP-1-NN-80-S-3-C6-C-02-GBA-35-35-24 90L055KP1NN80S3C6C02GBA353524 90-L-055-KP-1-NN-80-S-3-C6-C-03-GBA-32-32-24 90L055KP1NN80S3C6C03GBA323224 90-L-055-KP-1-NN-80-S-3-S1-B-00-GBA-20-20-24 90L055KP1NN80S3S1B00GBA202024 90-L-055-KP-1-NN-80-S-3-S1-C-00-GBA-29-29-20 90L055KP1NN80S3S1C00GBA292920 90-L-055-KP-1-NN-80-S-3-S1-C-00-GBA-32-32-20 90L055KP1NN80S3S1C00GBA323220 90-L-055-KP-1-NN-80-S-3-S1-C-00-GBA-35-35-24 90L055KP1NN80S3S1C00GBA353524 90-L-055-KP-1-NN-80-S-3-S1-C-02-GBA-35-35-24 90L055KP1NN80S3S1C02GBA353524 90-L-055-KP-1-NN-80-S-3-S1-C-02-GBA-42-42-24 90L055KP1NN80S3S1C02GBA424224 90-L-055-KP-1-NN-80-S-3-S1-C-03-GBA-32-23-24 90L055KP1NN80S3S1C03GBA322324 90-L-055-KP-1-NN-80-S-3-S1-C-03-GBA-32-32-24 90L055KP1NN80S3S1C03GBA323224 90-L-055-KP-1-NN-80-S-3-S1-C-03-GBA-35-35-24 90L055KP1NN80S3S1C03GBA353524 90-L-055-KP-1-NN-80-S-3-S1-C-03-GBA-42-42-24 90L055KP1NN80S3S1C03GBA424224 90-L-055-KP-1-NN-80-S-3-S1-D-02-GBA-26-26-24 90L055KP1NN80S3S1D02GBA262624 90-L-055-KP-1-NN-80-S-3-S1-D-03-GBA-35-35-28 90L055KP1NN80S3S1D03GBA353528 90-L-055-KP-1-NN-80-S-4-S1-C-03-GBA-26-26-24 90L055KP1NN80S4S1C03GBA262624 90-L-055-KP-1-NN-80-S-4-S1-C-03-GBA-42-14-24 90L055KP1NN80S4S1C03GBA421424 90-L-055-KP-1-NN-80-S-4-S1-C-03-GBA-42-42-24 90L055KP1NN80S4S1C03GBA424224 90-L-055-KP-1-NN-80-S-4-S1-C-05-GBA-32-32-24 90L055KP1NN80S4S1C05GBA323224 90-L-055-KP-1-NN-80-S-4-S1-D-02-GBA-26-26-24 90L055KP1NN80S4S1D02GBA262624 90-L-055-KP-1-NN-81-P-3-S1-C-03-GBA-35-35-20 90L055KP1NN81P3S1C03GBA353520 90-L-055-KP-1-NN-81-S-3-S1-C-03-GBA-29-29-20 90L055KP1NN81S3S1C03GBA292920 90-L-055-KP-2-CD-80-P-4-S1-C-00-GBA-35-35-24 90L055KP2CD80P4S1C00GBA353524 90-L-055-KP-2-NN-80-P-3-S1-C-03-GBA-23-23-24 90L055KP2NN80P3S1C03GBA232324 90-L-055-KP-2-NN-80-R-3-S1-C-03-GBA-35-35-24 90L055KP2NN80R3S1C03GBA353524 90-L-055-KP-5-BC-80-L-3-S1-D-03-GBA-29-29-24 90L055KP5BC80L3S1D03GBA292924 90-L-055-KP-5-CD-60-P-3-S1-D-03-GBA-45-45-24 90L055KP5CD60P3S1D03GBA454524 90-L-055-KP-5-CD-80-L-4-S1-D-03-GBA-35-35-24 90L055KP5CD80L4S1D03GBA353524 90-L-055-KP-5-CD-80-P-3-C6-C-00-GBA-32-32-24 90L055KP5CD80P3C6C00GBA323224 90-L-055-KP-5-CD-80-P-3-S1-C-00-GBA-32-32-24 90L055KP5CD80P3S1C00GBA323224 90-L-055-KP-5-CD-80-P-3-S1-C-03-GBA-38-38-20 90L055KP5CD80P3S1C03GBA383820 90-L-055-KP-5-CD-80-P-3-S1-C-03-GBA-38-38-24 90L055KP5CD80P3S1C03GBA383824 90-L-055-KP-5-CD-80-R-3-S1-C-03-GBA-20-20-20 90L055KP5CD80R3S1C03GBA202020 90-L-055-KP-5-CD-80-R-4-S1-C-03-GBA-29-29-24 90L055KP5CD80R4S1C03GBA292924 90-L-055-KP-5-CD-80-S-3-S1-C-03-GBA-29-29-20 90L055KP5CD80S3S1C03GBA292920 90-L-055-KP-5-CD-80-S-3-S1-D-03-GBA-42-42-24 90L055KP5CD80S3S1D03GBA424224 90-L-055-KP-5-CD-80-S-3-S1-D-03-GBA-45-45-24 90L055KP5CD80S3S1D03GBA454524 90L055-KP-5-CD-80-S-4-S1-C-03-GBA-29-29-20 90L055KP5CD80S4S1C03GBA292920 90-L-055-KP-5-CD-80-S-4-S1-C-03-GBA-29-29-20 90L055KP5CD80S4S1C03GBA292920 90-L-055-KP-5-NN-60-P-3-S1-D-03-GBA-45-45-24 90L055KP5NN60P3S1D03GBA454524 90-L-055-KP-5-NN-60-R-4-S1-C-03-GBA-29-29-20 90L055KP5NN60R4S1C03GBA292920 90-L-055-KP-5-NN-80-L-3-C6-D-00-GBA-38-32-24 90L055KP5NN80L3C6D00GBA383224 90-L-055-KP-5-NN-80-P-3-S1-C-00-GBA-32-32-24 90L055KP5NN80P3S1C00GBA323224 90-L-055-KP-5-NN-80-P-3-S1-C-03-GBA-38-38-20 90L055KP5NN80P3S1C03GBA383820 90-L-055-KP-5-NN-80-P-3-S1-C-03-GBA-38-38-24 90L055KP5NN80P3S1C03GBA383824 90-L-055-KP-5-NN-80-P-3-S1-C-03-GBA-40-40-24 90L055KP5NN80P3S1C03GBA404024 90-L-055-KP-5-NN-80-P-4-S1-C-03-GBA-29-29-24 90L055KP5NN80P4S1C03GBA292924 90-L-055-KP-5-NN-80-R-3-S1-C-03-GBA-20-20-20 90L055KP5NN80R3S1C03GBA202020 90-L-055-KP-5-NN-80-R-3-S1-C-03-GBA-35-35-24 90L055KP5NN80R3S1C03GBA353524 90-L-055-KP-5-NN-80-R-4-S1-C-03-GBA-20-20-24 90L055KP5NN80R4S1C03GBA202024 90-L-055-KP-5-NN-80-S-3-S1-C-03-GBA-29-29-20 90L055KP5NN80S3S1C03GBA292920 90-L-055-KP-5-NN-80-S-3-S1-D-03-GBA-42-42-24 90L055KP5NN80S3S1D03GBA424224 90-L-055-KP-5-NN-80-S-3-S1-D-03-GBA-45-45-24 90L055KP5NN80S3S1D03GBA454524。
